Genital mutilation/cutting is costly in terms of health, survival and reproduction, and the long-term maintenance of these practices is an evolutionary conundrum. Previous studies have suggested a mate-guarding function or various signalling functions of genital mutilation/cutting. Here we use phylogenetic comparative methods and two global ethnographic samples to study the origins and socio-ecological correlates of major types of female and male genital mutilation/cutting. Male genital mutilation/cutting probably originated in polygynous societies with separate residence of co-wives, supporting a mate-guarding function. Female genital mutilation/cutting originated subsequently and almost exclusively in societies already practising male genital mutilation/cutting, where it may have become a signal of chastity. Both have originated multiple times, some as early as in the mid-Holocene (5,000–7,000 years ago), considerably predating the earliest archaeological evidence and written records. Genital mutilation/cutting co-evolves with and may help maintain fundamental social structures, hindering efforts to change these cultural practices.
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The data for all analyses are available at https://github.com/gabrielsaffa/genital-mutilation-cutting.
The code for all analyses is available at https://github.com/gabrielsaffa/genital-mutilation-cutting.
WHO Guidelines on the Management of Health Complications from Female Genital Mutilation (WHO, 2016).
Protocol to the African Charter on Human and People’s Rights on the Rights of Women in Africa (Maputo Protocol Text) (African Union, 2003); https://projects.iq.harvard.edu/violenceagainstwomen/publications/protocol-african-charter-human-and-peoples-rights-rights-women-0
Muthumbi, J., Svanemyr, J., Scolaro, E., Temmerman, M. & Say, L. Female genital mutilation: a literature review of the current status of legislation and policies in 27 African countries and Yemen. Afr. J. Reprod. Health 19, 32–40 (2015).
Efferson, C., Vogt, S. & Fehr, E. The promise and the peril of using social influence to reverse harmful traditions. Nat. Hum. Behav. 4, 55–68 (2020).
Bell, K. Genital cutting and Western discourses on sexuality. Med. Anthropol. Q. 19, 125–148 (2005).
Darby, R. & Svoboda, J. S. A rose by any other name? Rethinking the similarities and differences between male and female genital cutting. Med. Anthropol. Q. 21, 301–323 (2007).
Mackie, G. Ending footbinding and infibulation: a convention account. Am. Sociol. Rev. 61, 999–1017 (1996).
Ross, C. T., Strimling, P., Ericksen, K. P., Lindenfors, P. & Mulder, M. B. The origins and maintenance of female genital modification across Africa: Bayesian phylogenetic modeling of cultural evolution under the influence of selection. Hum. Nat. 27, 173–200 (2016).
Kouba, L. J. & Muasher, J. Female circumcision in Africa: an overview. Afr. Stud. Rev. 28, 95–110 (1985).
Doyle, D. Ritual male circumcision: a brief history. J. R. Coll. Physicians Edinb. 35, 279–285 (2005).
Megahed, M. & Vymazalová, H. Ancient Egyptian royal circumcision from the pyramid complex of Djedkare. Anthropologie 49, 155–164 (2011).
Cox, G. & Morris, B. J. in Surgical Guide to Circumcision (eds Bolnick, D. et al.) 243–259 (Springer, 2012); https://doi.org/10.1007/978-1-4471-2858-8_21
Assaad, M. B. Female circumcision in Egypt: social implications, current research, and prospects for change. Stud. Fam. Plann. 11, 3–16 (1980).
Howard, J. A. & Gibson, M. A. Is there a link between paternity concern and female genital cutting in West Africa? Evol. Hum. Behav. 40, 1–11 (2019).
Shell-Duncan, B., Obungu, O. W. & Auko, M. L. in Female “Circumcision” in Africa: Culture, Controversy and Change (eds Shell-Duncan, B. & Hernlund, Y.) 109–128 (Lynne Rienner, 2001).
Murdock, G. P. Ethnographic Atlas: a summary. Ethnology 6, 109–236 (1967).
Wilson, C. G. Male genital mutilation: an adaptation to sexual conflict. Evol. Hum. Behav. 29, 149–164 (2008).
Paige, K. & Paige, J. M. The Politics of Reproductive Ritual (Univ. California Press, 1981).
Sosis, R., Kress, H. C. & Boster, J. S. Scars for war: evaluating alternative signaling explanations for cross-cultural variance in ritual costs. Evol. Hum. Behav. 28, 234–247 (2007).
Ludvico, L. R. & Kurland, J. A. Symbolic or not-so-symbolic wounds: the behavioral ecology of human scarification. Ethol. Sociobiol. 16, 155–172 (1995).
Feillard, A. & Marcoes, L. Female circumcision in Indonesia: to “Islamize” in ceremony or secrecy. Archipel 56, 337–367 (1998).
Cory, H. Jando. Part I: the constitution and organization of the Jando. J. R. Anthropol. Inst. 77, 159–168 (1947).
Clarence-Smith, W. G. Islam and female genital cutting in Southeast Asia: the weight of the past. J. Ethn. Migr. 3, 14–22 (2008).
Ericksen, K. P. Female genital mutilations in Africa. Cross Cult. Res. 23, 182–204 (1989).
Basedow, H. Subincision and kindred rites of the Australian Aboriginal. J. R. Anthropol. Inst. 57, 123–156 (1927).
Santos-Granero, F. Vital Enemies: Slavery, Predation, and the Amerindian Political Economy of Life (Univ. Texas Press, 2009).
Montagu, M. A. Infibulation and defibulation in the Old and New Worlds. Am. Anthropol. 47, 464–467 (1945).
Ashley‐Montagu, M. F. The origin of subincision in Australia. Oceania 8, 193–207 (1937).
Dow, M. M. & Eff, E. A. Multiple imputation of missing data in cross-cultural samples. Cross Cult. Res. 43, 206–229 (2009).
Duda, P. & Zrzavý, J. Human population history revealed by a supertree approach. Sci. Rep. 6, 29890 (2016).
Duda, P. & Zrzavy, J. in Modern Human Origins and Dispersal (eds Sahle, Y. et al.) 331–359 (Kerns Verlag, 2019).
Minocher, R., Duda, P. & Jaeggi, A. V. Explaining marriage patterns in a globally representative sample through socio-ecology and population history: a Bayesian phylogenetic analysis using a new supertree. Evol. Hum. Behav. 40, 176–187 (2019).
von Rueden, C. R. & Jaeggi, A. V. Men’s status and reproductive success in 33 nonindustrial societies: effects of subsistence, marriage system, and reproductive strategy. Proc. Natl Acad. Sci. USA 113, 10824–10829 (2016).
Martin, J. S., Ringen, E. J., Duda, P. & Jaeggi, A. V. Harsh environments promote alloparental care across human societies. Proc. Biol. Sci. 287, 20200758 (2020).
Grollemund, R. et al. Bantu expansion shows that habitat alters the route and pace of human dispersals. Proc. Natl Acad. Sci. USA 112, 13296–13301 (2015).
Bouckaert, R. et al. Mapping the origins and expansion of the Indo-European language family. Science 337, 957–960 (2012).
Gray, R. D., Drummond, A. J. & Greenhill, S. J. Language phylogenies reveal expansion pulses and pauses in Pacific settlement. Science 323, 479–483 (2009).
Murdock, G. P. & White, D. R. Standard cross-cultural sample. Ethnology 8, 329–369 (1969).
Bloch, M. & Bloch, M. From Blessing to Violence: History and Ideology in the Circumcision Ritual of the Merina (Cambridge Univ. Press, 1986).
Kaptein, N. in Pluralism and Identity: Studies in Ritual Behaviour (eds Platvoet, J. G. & Van Der Toorn, K) 285–302 (Brill, 1995).
Borgerhoff Mulder, M., Nunn, C. L. & Towner, M. C. Cultural macroevolution and the transmission of traits. Evol. Anthropol. 15, 52–64 (2006).
Ives, A. R. & Garland, T. Phylogenetic logistic regression for binary dependent variables. Syst. Biol. 59, 9–26 (2010).
Burnham, K. P. & Anderson, D. R. Practical use of the information-theoretic approach. In Model Selection and Inference 75–117 (Springer, 1998); https://doi.org/10.1007/978-1-4757-2917-7_3
Pagel, M. Detecting correlated evolution on phylogenies: a general method for the comparative analysis of discrete characters. Proc. R. Soc. Lond. B 255, 37–45 (1994).
Bentley, R. A., Moritz, W. R., Ruck, D. J. & O’Brien, M. J. Evolution of initiation rites during the Austronesian dispersal. Sci. Prog. 104, 003685042110313 (2021).
Buss, D. M. & Schmitt, D. P. Sexual strategies theory: an evolutionary perspective on human mating. Psychol. Rev. 100, 204–232 (1993).
Onyishi, I. E., Prokop, P., Okafor, C. O. & Pham, M. N. Female genital cutting restricts sociosexuality among the Igbo people of southeast Nigeria. Evol. Psychol. 14, 1–7 (2016).
Marlowe, F. Paternal investment and the human mating system. Behav. Process. 51, 45–61 (2000).
Scelza, B. A. et al. High rate of extrapair paternity in a human population demonstrates diversity in human reproductive strategies. Sci. Adv. 6, eaay6195 (2020).
Pankhurst, A. ‘Caste’ in Africa: the evidence from south-western Ethiopia reconsidered. Africa 69, 485–509 (1999).
Tamari, T. The development of caste systems in West Africa. J. Afr. Hist. 32, 221–250 (1991).
Swantz, M. Ritual and Symbol in Transitional Zaramo Society with Special Reference to Women (Nordiska Afrikainstitutet, 1986).
Basava, K., Zhang, H. & Mace, R. A phylogenetic analysis of revolution and afterlife beliefs. Nat. Hum. Behav. 5, 604–611 (2021).
Birket-Smith, K. An Ethnological Sketch of Rennell Island: A Polynesian Outlier in Melanesia (Det Kongelige Danske Videnskabernes Selskab, 1956).
Shakirat, G. O., Alshibshoubi, M. A., Delia, E., Hamayon, A. & Rutkofsky, I. H. An overview of female genital mutilation in Africa: are the women beneficiaries or victims? Cureus 12, e10250 (2020).
Shell-Duncan, B., Wander, K., Hernlund, Y. & Moreau, A. Dynamics of change in the practice of female genital cutting in Senegambia: testing predictions of social convention theory. Soc. Sci. Med. 73, 1275–1283 (2011).
Howard, J. A. & Gibson, M. A. Frequency-dependent female genital cutting behaviour confers evolutionary fitness benefits. Nat. Ecol. Evol. 1, 0049 (2017).
World Health Organization and Joint United Nations Programme on HIV/AIDS Male Circumcision: Global Trends of Prevalence, Safety, and Acceptability (WHO Press, 2008).
Ferreira, U., Netto, N. R., Esteves, S. C., Rivero, M. A. & Schirren, C. Comparative study of the fertility potential of men with only one testis. Scand. J. Urol. Nephrol. 25, 255–259 (1991).
Guma, S. M. Some aspects of circumcision in Basutoland. Afr. Stud. 24, 241–250 (1965).
Bahrami-Rad, D., Becker, A. & Henrich, J. Tabulated nonsense? Testing the validity of the Ethnographic Atlas. Econ. Lett. 204, 109880 (2021).
Ringen, E. J., Duda, P. & Jaeggi, A. V. The evolution of daily food sharing: a Bayesian phylogenetic analysis. Evol. Hum. Behav. 40, 375–384 (2019).
Marlowe, F. The Hadza: Hunter-Gatherers of Tanzania (Univ. California Press, 2010).
Cronk, L. From Mukogodo to Maasai: Ethnicity and Cultural Change in Kenya (Taylor and Francis, 2018); https://doi.org/10.4324/9780429500343
Waldeck, S. E. Social norm theory and male circumcision: why parents circumcise. Am. J. Bioeth. 3, 55–57 (2003).
Pashaei, T., Ponnet, K., Moeeni, M., Khazaee-Pool, M. & Majlessi, F. Daughters at risk of female genital mutilation: examining the determinants of mothers’ intentions to allow their daughters to undergo female genital mutilation. PLoS ONE 11, e0151630 (2016).
Boyle, E. H. & Svec, J. Intergenerational transmission of female genital cutting: community and marriage dynamics. J. Marriage Fam. 81, 631–647 (2019).
Akweongo, P., Jackson, E. F., Appiah-Yeboah, S., Sakeah, E. & Phillips, J. F. It’s a woman’s thing: gender roles sustaining the practice of female genital mutilation among the Kassena-Nankana of northern Ghana. Reprod. Health 18, 52 (2021).
Timæus, I. M. & Reynar, A. Polygynists and their wives in sub-Saharan Africa: an analysis of five demographic and health surveys. Popul. Stud. 52, 145–162 (1998).
Religion and Living Arrangements Around the World (Pew Research Center, 2019).
Oh, S. Y., Bowles, S. & Borgerhoff Mulder, M. The Decline of Polygyny: An Interpretation Working Paper No. 1. (Santa Fe Institute, 2017).
Whitehouse, B. in International Handbook on Gender and Demographic Processes (eds Riley, N. & Brunson, J.) 299–313 (Springer, 2018); https://doi.org/10.1007/978-94-024-1290-1_20
Merli, C. Male and female genital cutting among southern Thailand’s Muslims: rituals, biomedical practice and local discourses. Cult. Health Sex. 12, 725–738 (2010).
Prazak, M. Making the Mark: Gender, Identity, and Genital Cutting (Ohio Univ. Press, 2016).
Lunde, I. B., Hauge, M. I., Johansen, R. E. B. & Sagbakken, M. ‘Why did I circumcise him?’ Unexpected comparisons to male circumcision in a qualitative study on female genital cutting among Kurdish–Norwegians. Ethnicities 20, 1003–1024 (2020).
Kirby, K. R. et al. D-PLACE: a global database of cultural, linguistic and environmental diversity. PLoS ONE 11, e0158391 (2016).
South, A. rworldmap: a new R package for mapping global data. R J. 3, 35–43 (2011).
Fox, J., Friendly, M. & Weisberg, S. Hypothesis tests for multivariate linear models using the car package. R J. 5, 39–52 (2013).
Zuur, A. F., Ieno, E. N. & Elphick, C. S. A protocol for data exploration to avoid common statistical problems. Methods Ecol. Evol. 1, 3–14 (2010).
Lê, S., Josse, J. & Husson, F. FactoMineR: an R package for multivariate analysis. J. Stat. Softw. 25, 1–18 (2008).
Stekhoven, D. J. & Bühlmann, P. MissForest—non-parametric missing value imputation for mixed-type data. Bioinformatics 28, 112–118 (2012).
Fritz, S. A. & Purvis, A. Selectivity in mammalian extinction risk and threat types: a new measure of phylogenetic signal strength in binary traits. Conserv. Biol. 24, 1042–1051 (2010).
Orme, D. et al. Caper: comparative analyses of phylogenetics and evolution in R. R package version 0.5.2/r121 (2014).
Bollback, J. P. SIMMAP: stochastic character mapping of discrete traits on phylogenies. BMC Bioinformatics 7, 88 (2006).
Huelsenbeck, J. P., Nielsen, R. & Bollback, J. P. Stochastic mapping of morphological characters. Syst. Biol. 52, 131–158 (2003).
Revell, L. J. phytools: an R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol. 3, 217–223 (2012).
Schluter, D., Price, T., Mooers, A. O. & Ludwig, D. Likelihood of ancestor states in adaptive radiation. Evolution 51, 1699–1711 (1997).
Ho, L., Ane, C., Lachlan, R., Tarpinian, K. & Feldman, R. Package ‘phylolm’. R package version 2.6.2 (2020).
Ives, A. R. R2s for correlated data: phylogenetic models, LMMs, and GLMMs. Syst. Biol. 68, 234–251 (2019).
This research was supported by the Czech Science Foundation grant no. 18-23889S and Grant Agency of University of South Bohemia grant no. 048/2019/P (G.Š.). The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript. We thank L. S. T. Ho for advice on the regression analyses, M. Lang for helpful comments on the manuscript and E. Nelson for English proofreading.
The authors declare no competing interests.
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a) clitoridectomy; b) excision; c) infibulation; d) male circumcision; e) superincision.
Extended Data Fig. 2 Geographic distribution and cultural evolution of FGC and MGC in the EA sample.
Left: geographic distribution of FGC in the EA sample and reconstruction of ancestral states using stochastic character mapping. Right: geographic distribution of MGC in the EA sample and reconstruction of ancestral states using stochastic character mapping.
Extended Data Fig. 3 Coefficient plots with parameter estimates from the phylogenetic logistic regression models for the SCCS sample.
a) FGC; b) clitoridectomy; c) excision; d) infibulation; e) MGC; f) male circumcision; g) superincision. Each plot includes best-fitting models for a given practice as indicated by different symbols. The point estimates represent bootstrapped mean parameter estimates, and the error bars represent bootstrapped 95% CIs based on 2,000 simulations. The parameter values are on the log odds scale.
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Šaffa, G., Zrzavý, J. & Duda, P. Global phylogenetic analysis reveals multiple origins and correlates of genital mutilation/cutting. Nat Hum Behav 6, 635–645 (2022). https://doi.org/10.1038/s41562-022-01321-x
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