Twenty-five years since foundational publications on valuing ecosystem services for human well-being1,2, addressing the global biodiversity crisis3 still implies confronting barriers to incorporating nature’s diverse values into decision-making. These barriers include powerful interests supported by current norms and legal rules such as property rights, which determine whose values and which values of nature are acted on. A better understanding of how and why nature is (under)valued is more urgent than ever4. Notwithstanding agreements to incorporate nature’s values into actions, including the Kunming-Montreal Global Biodiversity Framework (GBF)5 and the UN Sustainable Development Goals6, predominant environmental and development policies still prioritize a subset of values, particularly those linked to markets, and ignore other ways people relate to and benefit from nature7. Arguably, a ‘values crisis’ underpins the intertwined crises of biodiversity loss and climate change8, pandemic emergence9 and socio-environmental injustices10. On the basis of more than 50,000 scientific publications, policy documents and Indigenous and local knowledge sources, the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) assessed knowledge on nature’s diverse values and valuation methods to gain insights into their role in policymaking and fuller integration into decisions7,11. Applying this evidence, combinations of values-centred approaches are proposed to improve valuation and address barriers to uptake, ultimately leveraging transformative changes towards more just (that is, fair treatment of people and nature, including inter- and intragenerational equity) and sustainable futures.
Over millennia and around the world, people have developed myriad ways of understanding and relating to nature and its many values7. Although acknowledged in some policy realms, a lot of work remains to consider this diversity in practice (for example, GBF Target 14 regarding “full integration of biodiversity and its multiple values into policies, regulations, planning and development processes … across all levels of government and … sectors”5). We assessed diverse evidence sources to synthesize how nature’s values are expressed by people and to clarify how nature’s values are considered in decisions, including what and whose values are involved or affected. We also introduce a typology that comprises four interrelated meanings of value or its ‘layers’12 (Fig. 1).
The typology’s first layer, ‘worldviews’, encompass the ways people conceive and interact with the world, expressed through ‘knowledge systems’ (bodies of knowledge, practices and beliefs associated with culture and language)13. In the literature, worldviews are frequently classified as anthropocentric (prioritizing human interests) or biocentric and ecocentric (emphasizing living beings or nature’s processes as a whole). Pluricentric is also used in the typology to encompass those worldviews with no single ‘centre’ (focusing on several intertwined relationships among humans, other-than-human beings, nature’s components and systemic processes). Next, the second layer, ‘broad values’ entail the moral principles and life goals held and expressed by individuals, groups and through the institutions (norms and rules) that guide people’s interactions with nature and with each other. Certain broad values such as justice, stewardship, unity and responsibility are frequently found to align with sustainability14. ‘Specific values’, the typology’s third layer, refer to how judgements regarding the importance of nature and its contributions to people are justified in ‘specific’ contexts. It is well established that nature’s specific values can be instrumental (nature as a means to a desired human end)15 or intrinsic (value of nature, considered and expressed by people, as an end in itself)16. For example, whereas many philosophers interpret intrinsic value in ways that do not relate to the valuer’s well-being, economists tend to view intrinsic values as partly connected to a person’s well-being, but separate from their own use (a non-use value). The relational category of specific values captures how people express the importance of meaningful relationships between people and nature and among people through nature such as reciprocity and care17. Finally, the fourth layer, ‘value indicators’ are quantitative measures and qualitative descriptors used to denote nature and people–nature relationships and nature’s contributions to people (NCP)18, typically in biophysical, monetary or socio-cultural terms12.
Cutting across these layers, life frames depict how individuals, institutions or policies might prioritize subsets of values depending on how people–nature relationships are framed12,19. For example, ‘living from’ nature emphasizes instrumental values such as nature’s capacity to provide resources for sustaining livelihoods. ‘Living in’ nature focuses on how people recognize nature’s importance as settings for their lives, practices and cultures, particularly supporting relational values. ‘Living with’ nature centres on nature’s life-supporting processes and connections to other-than-human beings, thereby prioritizing both intrinsic and relational values. ‘Living as’ nature prioritizes embodying and perceiving nature as a physical, mental and spiritual part of oneself, emphasizing broad values of oneness, kinship and interdependence. Different life frames are expressed in varying combinations across time and contexts, but research and policy most frequently align with ‘living from’ nature.
This plurality of values is found around the world. For example, in postindustrial societies with high levels of material security20, we see increasing endorsement of relational and intrinsic values such as seeing wildlife as part of one’s social community and deserving of rights21. In the Global South, where lower levels of livelihood security may favour instrumental values20, relational value expressions are also prevalent, such as spirituality and cultural identity22,23. Similarly, Indigenous and local knowledge are embodied in different philosophies of good living around the world underpinned by relational values as the basis for collective people–nature well-being12, including through concepts such as Buen vivir in South America24, Ubuntu in sub-Saharan Africa25 and Satoyama in Japan26, among others.
The typology of values facilitates more comprehensive identification of nature’s values in complex decision-making contexts. We demonstrate this use to analyse the restoration of India’s Chilika Lagoon (Supplementary Information, Section C). Designated a Ramsar site in 1981, Chilika was listed on the convention’s Montreux Record in 1993, due to ecological degradation from human actions (such as aquaculture, development infrastructure) that also harmed numerous stakeholders, including conservationists, traditional fishers, aquaculturists and farmers. In 2001, Chilika became the only Asian wetland to be ‘delisted’ as an area of concern after a successful restoration effort shifted decision-making from a narrow focus on extractive activities, for instance, those linked to aquaculture’s instrumental values, or strict conservation, including those linked to biodiversity’s intrinsic values, to a plural-values perspective that balances these with people’s important connections to the wetland such as relational values connected to the cultural identify of being fishers. Integrating such specific value types into decisions geared towards wetland restoration required monitoring biophysical indicators (water flow, fish diversity), economic and financial aspects through monetary measures (income growth and distribution), and socio-cultural descriptors (veneration of religious sites, relationships between fishers and dolphins). A specific decision-making authority was created for the wetland that accounted for diverse stakeholders’ worldviews (in this case, conservationists’ bio- or ecocentric worldview, as well as fishers’ anthropocentric and pluricentric perspectives) to better align actions with broad values underpinning key human–nature relations, exemplified here in the symbiotic relationships between fishers and Irrawaddy dolphins. Identifying these many-value layers and types within the values typology can facilitate their integration into decisions, ultimately enhancing legitimacy, such as through recognition justice, and reconciling value clashes, as can arise between fishers, aquaculturists and environmental managers.
This case also illustrates the potential challenges and approaches to accounting for the many values held by different stakeholders in decisions. For example, the wetland’s specific values are directly ‘comparable’ when they can be accounted for with the same indicators (for example, monetary metrics for cost–benefit analyses of tourism development projects, in which investment costs are compared with the market and non-market economic effects on people and the wetland). Other specific values can be ‘compatible’ when they share common features such as being measured in spatial units, allowing them to be addressed together, despite using different indicators (for example, spatially overlaying bundles of the wetland’s contributions to people proxied with biophysical, monetary and socio-cultural indicators). However, some values are simply ‘incommensurable’, being neither comparable nor compatible with others27. For instance, a wetland could be solely managed for fisheries and commercial tourism to enhance some stakeholder’s instrumental values, such as economic benefits or nutritional yield, but erode other intrinsic values, such as keystone species’ habitat, and relational values, including fishers’ cultural identity. Without a common or compatible denominator, decisions cannot rely on standard trade-off analyses (for example, cost–benefit analysis, multicriteria decision aid); rather, they should treat these values in ‘parallel’.
The challenge of incommensurability does not indicate that any particular value by definition should have higher priority than others in decision-making. It does mean that procedures need to recognize values that would otherwise be excluded or lost and ensure reasoned prioritization. Societies create principles to handle such difficult evaluations. For example, several countries have institutionalized the precautionary principle for situations when the consequences of decisions are largely unknown. Similarly, dealing with incommensurability demands further development of agreed principles, which may in turn require deliberative approaches12 to help decision makers choose among alternative policy options. This can complement evidence based on ‘social’ preferences (that is, aggregated individual preferences) although it is well understood in social-choice research that aggregation of individual preferences to guide fair societal choices faces dilemmas28. The challenges compound when different value types need to be weighed against each other and aggregated. Yet, as participatory processes can be manipulated, power asymmetries should be addressed.
Valuation methods are diverse and spreading, but uptake remains limited
Valuation generates information that can be used to make nature’s values more visible to decision makers, such as a scarcity indicator to protect natural assets that are at the risk of being over-exploited (‘living from’ nature). Valuation can also be used to reveal the need to protect the ecological systems on which humanity depends (‘living with’ nature), and to recognize other ways humanity relates to nature (‘living in’ and ‘living as’ nature). At present, more than 50 well-established valuation methods from disciplines including anthropology, political science, economics and conservation biology are available to elicit the diverse values people hold for nature29. Several method classifications exist, notably those from environmental economics30, on which we expand to assess valuation methods grouped into four cross-disciplinary ‘method families’, based on the source of information about values: (1) nature-based valuation gathers information about the importance of nature and NCP through direct and indirect observation of nature (for example, spatial ecosystem services mapping)31, (2) statement-based valuation obtains information from people’s expressions of their values (such as stated preference surveys32, deliberative processes33), (3) behaviour-based valuation identifies how people value nature by observing what they do in relation to nature (such as hedonic pricing34, livelihood dependence35) and (4) integrated valuation brings together different types of value assessed with diverse information sources (for example, multicriteria decision aid)36 and also seeks to understand how values, behaviour and environmental outcomes interact in dynamic ways (for example, integrated modelling)37. Whereas the valuation field has advanced substantially regarding the first three method families, it has not yet reached maturity regarding its integration potential to understand the dynamic interactions and feedbacks between peoples’ values, behaviours and the impact on biophysical indicators38.
This classification system highlights the diversity of valuation methods across different disciplines and traditions, including those from Indigenous peoples and local communities (IPLCs). Although academic understanding of IPLC valuation methods is limited, existing documentation underscores the important role of worldviews and broad values, including social norms and cultural and spiritual beliefs, in these valuation procedures29. IPLC valuation practice can take a different form from the aforementioned categories, often being based on a communal process informed by Indigenous and local knowledge and long-held traditions, and guided by principles such as belonging, stewardship, responsibility and oneness with nature. Bringing together valuation methods associated with diverse worldviews is desirable, but requires giving equal footing to IPLC valuation, and accepting the limitations of knowledge integration39.
The availability of information influences the valuation method to be used. Likewise, the choice of a valuation method itself influences the information made available for decision-making, such as whether the focus is on instrumental, relational or intrinsic values, what evidence it is based on and the role of those participating in the valuation40. Furthermore, the application of any valuation method to real-world decision-making is conditioned by trade-offs between relevance (salience to the decision’s context), robustness (reliability and representation41,42) and resources (the time, financial, technical and human resources required to design and apply valuation). Therefore, method choice reflects different trade-offs among these ‘3Rs’; increasing the relevance and robustness of valuation typically requires more resources and determines to a large extent the feasibility of applying any given method29.
The number of peer-reviewed valuation studies around the world has increased on average by about 10% annually over the last three decades29. Nature-based valuation methods are the most commonly applied, followed by statement-based, behaviour-based and integrated valuation methods. Instrumental values are elicited more often than intrinsic and relational values. The ultimate goal of valuation varies, but three main purposes are observed: improving the state of nature, for instance, by assessing changes in ecosystem structure43; enhancing people’s quality of life, including assessing changes in the provision of NCP44; or generating more socially just outcomes by considering and assessing the various dimensions of justice as a broad value. Three widely recognized dimensions of justice include: (1) recognition justice, acknowledging and respecting different worldviews, knowledge systems and values, (2) procedural justice making decisions that are legitimate and inclusive for those holding different values, and (3) distributive justice, ensuring the fair distribution of NCP45. Valuation to guide decisions that improve the state of nature is prevalent in the literature, whereas a focus on distributive justice is rare (Fig. 2).
Valuations have been mostly undertaken in Europe, the Americas and Asia and the Pacific, and to a lesser extent in Africa and Central Asia. Studies have predominantly targeted forests, cultivated areas and inland water bodies (Fig. 2). Only 10% of valuation studies have been conducted in marine environments (coastal and deep sea) even though oceans cover more than 70% of the planet’s surface. Valuations have mainly been performed at subnational scales, rather than national and global scales, which reflects the scale of most decision-making. Very few studies deal with cross-regional or cross-national decision-making or explicitly reference IPLC rights and territories (Fig. 2). The global pattern suggests that the two main factors that increase the amount of valuation studies in a region are the level of threat to biodiversity and environmental quality, and availability of human and financial resources to conduct valuation29.
The evidence also indicates that most (62%) valuation studies, especially nature-based valuations, do not involve stakeholder participation in the valuation22. Furthermore, despite calls for increased use of valuation in policymaking, less than 5% of published peer-reviewed valuation studies document uptake of values information into decisions, a figure that has not increased over the past three decades46. Policy documents from many countries also show limited use of the suite of available valuation methods; only a few methods with certain value perspectives dominate valuation practice. For instance, when countries monitor the values of biodiversity (Aichi Target 2 of the Convention on Biological Diversity), their National Biodiversity Strategies and Action Plans generally use biophysical and to a lesser extent monetary indicators12,46. Despite the general perception that policymaking favours economic approaches to the valuation of nature47, during the last three decades, peer-reviewed economic valuation studies have not documented uptake more often than other (non-economic) approaches46.
Key barriers to valuation uptake in decision-making are partly due to a perceived lack of robustness and reliability of methods and also insufficient financial and technical resources to commission valuation and integrate it into decision-making processes and management actions22. Other barriers include a lack of relevance of valuation results to political jurisdictions, administrative levels, sectoral interests or different stakeholders, and the lag between delivery of study results relative to decision time frames46. Even when valuation is commissioned and well communicated in environmental impact assessments, it may be ignored or used to justify decisions to mitigate rather than avoid negative effects48. Additionally, powerful stakeholders can hinder the representation of diverse values in decisions by, for example, blocking people’s direct representation of their own voices or selectively using valuation methods to only partially represent their values7. Whereas guidance exists for improving participation and representation49, only 12% of assessed valuation studies explicitly consider design choices to improve stakeholder inclusion (for example, efforts to avoid excluding or marginalizing certain values)22 (Supplementary Information Section B, no. 10).
To increase the likelihood of uptake across the range of valuation approaches and contexts, valuation can be adapted and timed to suit policymaking needs regarding particular purposes and decision-support opportunities46. In particular, valuation can be tailored to support different stages of policymaking (often understood as a cycle in which learning from one policy feeds back into the design of the next; Fig. 3). These include: (1) aiding agenda setting and support commitment to agreed goals; (2) providing technical assistance for policy formulation by, for example, agreeing on the alternatives under consideration, or the design of economic incentives, such as payments for ecosystem services (PES); (3) supporting decisions for policy adoption and assessing cost-effectiveness of alternatives for policy action; (4) facilitating adjustments to implementation measures or budget allocations; and (5) helping undertake retrospective policy evaluation (Fig. 3 and Supplementary Information Section C)46.
Engaging diverse values improves decision outcomes
A review of impact evaluation studies on protected areas and an in-depth qualitative examination of case studies from around the world show that when local values such as stewardship are integrated, decision-making delivers more just and sustainable outcomes, especially when these values have been traditionally marginalized12,46. Studies have established that community involvement improves management effectiveness (based on an analysis of more than 8,000 assessments from more than 3,000 global protected areas50), and that local empowerment and recognition of local values, especially for Indigenous communities, enhances win–wins between ecological and social outcomes of protected areas (demonstrated in a meta-analysis of 171 peer-reviewed studies51 and a systematic review of 169 publications52, as well as in-depth case studies of our review (Supplementary Information Section B, no. 16). Studies also demonstrate that acknowledging nature’s many values can help PES programs avoid eroding inherent motivations for conservation or enhance existing pro-environmental behaviours, improving outcomes for people and nature53. Similarly, in agroecosystems, being able to recognize a comprehensive suite of small landholder values (including women’s) is key to codesigning initiatives that effectively conserve on-farm agro-biodiversity, ensure food security and sovereignty, and maintain place-based livelihoods46,54.
Further evidence from contextual analysis of case studies (Supplementary Information Section B, nos. 16, 17 and 18) in protected areas, PES programs and major infrastructure projects, such as mining and dams, suggests that power asymmetries among actors involved in or affected by policy decisions can disrupt the representation of the diverse values at stake, especially at the local level46. Developers that articulate instrumental values for large development and infrastructure projects often have more discursive and structural power than those local stakeholders negatively affected by these initiatives. For instance, dams are often proposed to enhance market-based instrumental values (such as electricity to urban consumers, irrigation water for agriculture, jobs), whereas the instrumental values of those damaged by the project (such as loss of other farming and fishing livelihoods) are excluded, as are many relational values (such as cultural identity, place attachment)46,55. Similarly, the diverse ways that IPLCs conceive and relate to nature’s many values are often underrepresented or enter too late into the decision process, such as in the design of protected areas and PES programs56,57.
Studies incorporating detailed case analysis across all continents have revealed that power asymmetries resulting in imbalanced representation of values in decisions have important consequences for people and nature. For instance, disregarding smallholders’ diverse values in the design of sustainability certification programs can lead programs to not account for the barriers these stakeholders face, compromising the intended positive social and environmental benefits58 (Supplementary Information Section B, no. 15). Likewise, ignoring or marginalizing locally held values in the design and implementation of conservation programs can leave a legacy of mistrust and create conflicts with local communities59,60, jeopardizing program outcomes over time (Supplementary Information Section B, nos. 16, 17). These failures can be avoided or better addressed when policies align with a more comprehensive suite of local values. This further implies that power asymmetries must be addressed head-on in the design and development of programs by recognizing the diversity (and potential incommensurability) of values held across all actors and ensuring participatory parity. Doing so can ultimately lead to more equitable distribution of projects’ costs and benefits in both conservation and development contexts46.
The diversity of values underpins many pathways towards sustainability
Navigating towards more just and sustainable futures entails imagining what this transformation might look like, a process that needs creative and analytical input. Scenario planning integrates thinking across several disciplines and can reveal important insights about values integration into policymaking. Only half of the 460 scenarios reviewed (Supplementary Information Section B, no. 23) mention or explicitly incorporate values. Where scenarios were codeveloped with stakeholders, most (94%) of these were underpinned by instrumental values14. The scenarios considered most likely to achieve more just and sustainable futures, however, typically consider instrumental, relational and intrinsic values, and especially emphasize these values regarding NCP14, although generally scenarios are not codeveloped by taking into account value trade-offs.
Beyond the unsustainable ‘business-as-usual’ pathway (typically used as a basis for comparison), we identify at least four well-established sustainability pathways7,14. The ‘green economy’ pathway stresses the importance of reforming economic institutions, technologies and performance metrics, while prioritizing instrumental values4,61. ‘Nature protection’ centres around protecting biodiversity for its own sake and expanding protected area networks62, highlighting intrinsic values (while also acknowledging instrumental values). ‘Earth stewardship’ emphasizes local sovereignty, solidarity and the promotion of biocultural practices63, underscoring relational values (and also acknowledging intrinsic values). Socially and ecologically sustainable ‘degrowth’ focuses on reducing overconsumption and overproduction, and redistributing wealth64,65, engaging instrumental, intrinsic and relational values. All these sustainability pathways are founded on broad values associated with intergenerational justice and respect for biophysical limits14 (Fig. 4).
Transformative change involves leveraging nature’s values
Achieving more just and sustainable futures calls for reforming societal structures to address asymmetric power relations underpinning the allocation of property rights, including legal decisions about who holds rights to degrade or be protected from environmental harm and who or what is a subject of rights (for example, a river, Mother Earth and so on). These reforms need to be complemented by the use of policy instruments to internalize negative environmental externalities that arise from the rift between private and public values, reducing overconsumption and overproduction, and by applying indicators of progress that include social and ecological sustainability criteria4. Achieving these actions also implies confronting the contradictions evidenced by the historical and current prioritization of a narrow suite of nature’s values. For example, governments and private enterprises frequently make decisions grounded in market-based instrumental values. Similarly, conservation policies have frequently prioritized nature’s intrinsic values, despite increasing advocacy regarding the instrumental and relational values held by those living within and around protected areas who rely on biodiversity for their livelihoods12,66. As a consequence, a system-wide strategy is needed across technological, economic and social domains, including profound changes that address the worldviews and broad values that underlie the direct and indirect drivers of biodiversity loss8,67. We identify four values-centred leverage points, ranging from short-term, easier to achieve actions to longer-term, harder to achieve efforts that, in combination, can catalyse system-wide transformative changes (Fig. 5).
The first leverage point involves improved valuation by identifying more diverse values of nature12 and ensuring there are methods and procedures to describe, record and report them22,46. Such recognition and accounting is still not widely done, but is an essential step for harnessing knowledge(s) and motivations to protect nature, including mobilizing a more inclusive set of specific values of nature and sustainability-aligned broad values14. Yet, although enhancing recognition of nature’s values and undertaking valuation are necessary, these efforts alone are insufficient to ensure pro-environmental decisions and behaviour14.
Therefore, the second leverage point involves enabling value information generated through valuation approaches to be embedded into decision-making46,68. Actions here may include using existing legal and economic policy measures (for example, green taxes) to make production and consumption decisions more sustainable or establishing guidelines for planning decisions that require consideration for the many values of nature. Whereas many theories explain causal relationships between values and behaviour, broader contexts partially determine people’s capacity and ability to act on their values69. Hence, interventions should be tailored accordingly, as illustrated by choice of transport mode being affected by availability of public transportation infrastructure. Furthermore, integrating values into policy decisions is more likely to occur when valuation is tailored for a specific policy purpose46,70. For instance, at a national level, development of standardized, high spatial resolution ecosystem accounts71 can provide the biophysical indicators to inform policy design. Some countries (for example, Portugal, Germany) already use biophysical indicators of conservation effort to then redistribute tax revenues (known as ecological fiscal transfers) to local and regional administrations as compensation for lost revenue and extra costs due to establishing and managing protected areas72. Likewise, using valuation as part of incentives for pro-environmental behaviour in production and consumption practices (including certification, tax rebates, PES and so on) offers opportunities for strengthening people’s sustainability-aligned values. In addition, embedding valuation into environmental and social safeguards (including land tenure rights, equitable access and benefits sharing and procedural justice) can promote conservation in IPLC territories52,57. To enable the conditions for embedding valuation into decisions, it is particularly important to implement inclusive and legitimate processes that meaningfully represent stakeholders’ values46.
The third leverage point involves reconfiguration of societal structures, especially with regard to the decision-making architecture to normalize and scale-up the incorporation of diverse values in decisions. This requires reforms to core legal, economic and political institutions (for example, property rights, trade rules, parliamentary systems) in ways that change what and whose values gain decision-making power in society73. Moderating the impetus towards short-term political decisions tied to electoral cycles (for example, instituting procedural rules that protect the interests of future generations) would also be an important structural reform. Another would be to enhance businesses’ capacity to care for nature’s values by broadening responsibility beyond shareholder interests (for example, instituting rules that preclude biodiversity loss throughout value chains). Similarly, reforming and complementing macroeconomic indicators (for example, gross domestic product) to include values that encompass social and ecological well-being could change both the design and intent of the economic system4. In the context of IPLCs, institutional reforms to secure territorial property rights and recognize the rights of natural entities (for example, rivers) have demonstrated potential to be highly transformative68,74. Similarly, embracing rights-based approaches would legitimize many IPLCs’ customary rules that already recognize and embed diverse values and valuation in their conservation decisions. All such institutional changes across sectors would alter predominant societal rules to better ensure recognition for diverse worldviews and broad values of nature. In turn, these actions could support broader reforms towards comanagement regimes and foster further institutional changes throughout political and economic systems, helping to overcome current resistance to the worldviews and values held by IPLCs. For example, revisiting the wetland case study (Supplementary Information Section C), the Chilika Development Authority was created to implement socially legitimate wetland restoration by ensuring dialogue that embraces the many values of its diverse stakeholder representatives.
Whereas the first three leverage points act on largely existing values, the fourth leverage point involves modifying underlying social norms and goals to reflect the links between justice and sustainability. Examples of fundamental changes in social norms include how a society views ‘progress’ or a ‘good life’ in terms of relationships with nature14. These tasks are complex, but inherently transformative. They accompany many institutional reforms contemplated in the previous leverage point (for example, changing macroeconomic indicators of ‘progress’ beyond gross domestic product) and could powerfully go beyond the goal of some sectors to continue increasing material and energy consumption in already affluent societies. Whereas environmental responsibility norms can be nurtured throughout the lever, strategies for wider socialization can aid larger-scale sustainability outcomes. For instance, empowering civil society’s role through new participative fora such as citizen assemblies could be a way to form new shared values or surface latent sustainability-aligned values, fostering a counter-force to dominant ways of conceiving the values of nature and shifting current hegemonic societal norms through more open dialogue75.
Transformative change is, thus, a multifaceted process involving engagement of the four values-centred leverage points. Fortunately, opportunities for synergies arise, as leverage points are not static categories; instead, there are interdependencies along the lever’s action gradient. Leverage points may be activated in a cumulative way (from left to right across the lever), such as when a policy change (for example, introducing a green tax) triggers a change in social norms over time (for example, recycling). Values-centred leverage points can also be triggered in the opposite direction (cascading down the lever). For example, in Europe a deep leverage point involved a shift in vision about the role of agriculture, driven by the wider societal goal of sustainability and epitomized through a political agreement underpinning the European Common Agricultural Policy. In the early 1990s, this involved a change from supporting the agricultural sector to ensure self-sufficiency to recognizing the need for mitigating the negative externalities harming wildlife and people’s health (a new social norm and goal). Since that time, a series of reforms and the associated political effort has increased the environmental components of the agricultural policy framework (the third leverage point). First, policy instruments and tools were implemented towards compliance with minimum environmental standards to justify income support to farmers. More recently, the reform has introduced environmentally targeted payments for adopting sustainable agricultural practices (the second leverage point)76. The designs of these policy instruments are being aided by the valuation of the externalities for which different methods and decision-support tools are used (for example, shadow pricing, choice experiments and cost–benefit analysis)77,78. This example illustrates how shifting societal norms and goals can trigger the activation of all other values-centred leverage points. Clearly, power relations must be confronted, such as between citizens and agri-business, that ultimately influence whose and which values get priority in decisions.
The transformative changes needed to achieve ambitious biodiversity and development goals require confronting the status quo and associated vested interests tightly tied to current institutions (norms and legal rules), including the allocation of property rights over nature. Such transformation also demands recognizing and integrating the diverse values of nature into political, economic and other day-to-day decision-making that informs environmental management. Given the current allocation of property rights in predominant political systems, the primacy of market-based instrumental values in many decisions is at the core of underlying direct and indirect drivers of today’s global biodiversity crisis67. These market-based values need to be balanced with the relational, intrinsic and non-market instrumental values that are also part-and-parcel of the reasons nature matters to people. Achieving more just and sustainable futures entails mobilizing and nurturing broad values and new societal norms and goals to trigger changes in the current institutional fabric of society. Fortunately, by using an inclusive typology of nature’s values and the extensive portfolio of existing valuation methods, decision-making can be better informed to reflect nature’s many values. Furthermore, value-centred leverage points can be triggered to achieve tangible, multiscale outcomes.
Nature’s values are expressed in and shaped by worldviews and knowledge systems, but also by power relations that underpin institutional structures in societies79. Thus, enabling solutions to the global biodiversity crisis implies identifying and navigating these issues of values diversity and associated potential conflicts. To scope the limitations and opportunities with respect to better integration of nature’s many values, we have contextualized our findings in light of real-world policymaking needs such as implementing the GBF’s new targets. Specifically, we propose (1) using an inclusive typology of values, (2) accessing the extensive portfolio of available valuation methods, and (3) engaging a range of leverage points that can be acted on for transformative change. To ignore the diversity of nature’s values in science and policy would be to continue to sell nature short to the detriment of all life on Earth.
This paper’s findings are supported by reviews undertaken for the IPBES Values Assessment11. These literature reviews came from 15 different disciplines, including social sciences, life sciences, the humanities and interdisciplinary mixed approaches. Review protocols were developed collaboratively by the author team and refined through two open review calls, three Indigenous and local knowledge dialogues and several stakeholder workshops. Different analytical approaches appropriate to different academic perspectives and knowledge traditions reflect various understandings of what makes evidence relevant (contextually appropriate or salient to the issue) and robust (reliable and valid information). Findings are, consequently, presented using qualitative and quantitative approaches.
In total, 29 different assessment protocols (Supplementary Information Sections A and B) were used, focused on five broad topics of nature’s values and valuation: (1) the diverse conceptualizations of the values of nature, (2) the ways values can be elicited and made visible through valuation methods and approaches, (3) how values and valuation can be integrated into decision-making processes, (4) the outcomes from such decisions on nature and people, and (5) the role that values play in future sustainability pathways. The reviews encompassed many evidence sources identified using diverse strategies including keyword searches, and natural language processing of 48,781 peer-reviewed papers on nature valuation. The evidence reviewed in depth included 1,163 valuation studies, 1,270 study-site units reporting on values-based outcomes for 217 case studies, 838 documents from the ‘grey literature’ of environmental and development policy (for example, reports from governmental, non-governmental organizations and valuation initiatives), 26 specific contributions from Indigenous and local knowledge holders and experts, 460 futures scenarios, 37 policy instruments, 217 country-specific datasets (for example, Aichi target 2 progress and UN System of Environmental-Economic Accounting—Ecosystem Accounting implementation) and 134 values-based behavioural theories (Supplementary Information Section B). This evidence was analysed in depth following quantitative and/or qualitative approaches, which were supported by discipline-specific standards. Most evidence sources were in English (96%) and covered 1981–2020, with a greater focus on 2000–2020. Most assessed information was from Western Europe, the USA, Canada and Australia (73%); a smaller share was produced in Asia Pacific (8%), Latin America and the Caribbean (5%), Africa (4%) and Eastern Europe (1%), and 5% had no clear origin.
Assessment protocols followed five general strategies: (1) comprehensive structured reviews using search strings and search terms that defined the review’s scope, the different filtering iterations, as well as defined parameters for the selection of the documents to review (Supplementary Information Section B, nos. 4, 9, 10, 19, 29); (2) semistructured reviews relying partially on expert-based search criteria (Supplementary Information Section B, nos. 3, 5, 6, 7, 11, 14, 15, 22, 23, 24); (3) non-structured reviews, fully based on expert criteria (Supplementary Information Section B, nos. 25, 27); (4) invited contributions from external experts and stakeholders through sources such as reports, news articles and art (Supplementary Information Section B, nos. 8, 18); and (5) combinations of the above (Supplementary Information Section B, nos. 1, 2, 12, 13, 16, 17, 20, 21, 26, 28). A diversity of analytics was applied among the 29 reviews, ranging from artificial intelligence-based automated text analysis to in-depth expert assessment of case studies. Furthermore, mixed-methods were used to systematize evidence, including quantitative (for example, frequency, correlation, cluster, geographical analyses) and qualitative approaches (for example, content analysis, analysis of constructs, identification of archetypes). Both inductive (for example, generalization and synthesis) and deductive (for example, hypothesis testing) approaches were applied to evaluate evidence. All protocols, data analyses and results were subjected to formal IPBES assessment procedures. Limitations concerning the accessibility to academic and particularly non-academic literature in diverse languages and the heterogeneous analytical approaches appropriate across disciplines were recognized and explicitly addressed.
Ethics and inclusion statement
The authors were experts who contributed to the IPBES Values Assessment, selected by IPBES following its formal rules and procedures, following an open call for nominations with consideration for balancing gender, geographical region and expertise to the extent possible. All the experts had specific roles in the production of the Values Assessment in accordance to the IPBES guide on the production of assessments (https://www.ipbes.net/documents/policies-procedures).
Further information on research design is available in the Nature Portfolio Reporting Summary linked to this article.
All the data are freely available online. The supplementary information provides links to Zenodo with specific DOIs where the data are stored for free use.
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We are grateful to the IPBES, whose 139-member states commissioned the Values Assessment and approved its Summary for Policymakers. We are also grateful for the contributions to the assessment’s review editors: S. Anderson, S. Baker, J. Camilo Cardenas, J. Cariño, K. Chan, J. Farley, C. Okereke, L. Pereira, E. Raez, H. Vessuri and R. Watson; the members of the management committee: B. Vilá, A. Díaz-de-León, C. Diaw, M. Avdibegovic, J. Marton-Lefevre and R. Allahverdiyev, and the more than 200 contributing authors who provided specific input to the full report. We express our gratitude to IPBES Executive Secretary A. Larigauderie and IPBES Chair A. M. Hernández for their strategic vision and continued advice. We received no specific funding for this work; all authors involved in IPBES do so on a voluntary basis. The IPBES Values Assessment was made possible thanks to many generous contributions, including non-earmarked contributions to the IPBES trust fund from governments. All donors are listed on the IPBES website www.ipbes.net/donors. U.P. acknowledges BC3’s Maria de Maeztu excellence accreditation 2023–2026 (reference no. CEX2021-001201-M) provided by grant no. MCIN/AEI/10.13039/501100011033.
The authors declare no competing interests.
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The Supplementary Information includes three parts. Part A explains how the paper is associated with the IPBES Values Assessment. Part B provides details about each of the 29 review protocols. Part C offers information about the case study of Chilika Lagoon, India, that is used in the main paper.
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Pascual, U., Balvanera, P., Anderson, C.B. et al. Diverse values of nature for sustainability. Nature 620, 813–823 (2023). https://doi.org/10.1038/s41586-023-06406-9