Article | Published:

Nomadic ecology shaped the highland geography of Asia’s Silk Roads

Nature volume 543, pages 193198 (09 March 2017) | Download Citation

Abstract

There are many unanswered questions about the evolution of the ancient ‘Silk Roads’ across Asia. This is especially the case in their mountainous stretches, where harsh terrain is seen as an impediment to travel. Considering the ecology and mobility of inner Asian mountain pastoralists, we use ‘flow accumulation’ modelling to calculate the annual routes of nomadic societies (from 750 m to 4,000 m elevation). Aggregating 500 iterations of the model reveals a high-resolution flow network that simulates how centuries of seasonal nomadic herding could shape discrete routes of connectivity across the mountains of Asia. We then compare the locations of known high-elevation Silk Road sites with the geography of these optimized herding flows, and find a significant correspondence in mountainous regions. Thus, we argue that highland Silk Road networks (from 750 m to 4,000 m) emerged slowly in relation to long-established mobility patterns of nomadic herders in the mountains of inner Asia.

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References

  1. 1.

    Sogdian Traders: A History. (Brill, 2005)

  2. 2.

    The Silk Road: A New History. (Oxford Univ. Press, 2012)

  3. 3.

    Religions of the Silk Road. (St. Martin’s Griffin, 1999)

  4. 4.

    Silk Roads or Steppe Roads? The Silk Roads in World History. J. World Hist. 11, 1–26 (2000)

  5. 5.

    Life Along the Silk Road. (Univ. California Press, 1999)

  6. 6.

    in Reconfiguring the Silk Road: New Research on East–West Exchange in Antiquity (eds & ) 41–54 (University of Pennsylvania Museum of Archaeology and Anthropology, 2014)

  7. 7.

    The Silk Roads: an ICOMOS thematic study. (ICOMOS, 2014)

  8. 8.

    Old World Trade Routes (OWTRAD) Project. (2012)

  9. 9.

    & in Cotsen Advanced Seminar Series Vol. 4, 603 (Regents of the University of California, Los Angeles, 2008)

  10. 10.

    , & Jeitun: Recent Excavations at an Early Neolithic Site in Southern Turkmenistan. Proc. Prehist. Soc. 62, 423–442 (1996)

  11. 11.

    et al. Between China and South Asia: a Middle Asian corridor of crop dispersal and agricultural innovation in the Bronze Age. The Holocene 26, 1541–1555 (2016)

  12. 12.

    , & Millet cultivation across Eurasia: Origins, spread, and the influence of seasonal climate. The Holocene 26, 1566–1575 (2016)

  13. 13.

    Agriculture in the central Asian Bronze Age. J. World Prehist. 28, 215–253 (2015)

  14. 14.

    in Shifts and Drifts in Nomad-Sedentary Relations (eds & ) 163–178 (Dr. Ludwig Reichert Verlag, 2005)

  15. 15.

    Multiregional emergence of mobile pastoralism and nonuniform institutional complexity across Eurasia. Curr. Anthropol. 53, 2–38 (2012)

  16. 16.

    et al. Burial ritual, agriculture, and craft production among Bronze Age pastoralists at Tasbas (Kazakhstan). Archaeological Research in Asia 1–2, 17–32 (2015)

  17. 17.

    & The landscape of ancient mobile pastoralism in the highlands of Uzbekistan, 2000 b.c.–a.d. 1400. J. Field Archaeol. 39, 195–212 (2014)

  18. 18.

    et al. Patterns of pastoralism in later Bronze Age Kazakhstan: new evidence from faunal and lipid residue analyses. J. Archaeol. Sci. 39, 2424–2435 (2012)

  19. 19.

    Pastoralism in the Gorno-Badakhshan Region of Tajikistan. Nomad. People. 9, 199–206 (2005)

  20. 20.

    in Prehistoric Steppe Adaptation and the Horse (eds , & ) 203–232 (McDonald Institute for Archaeological Research, 2003)

  21. 21.

    Pastoral nomadism in the Indus civilization: an hypothesis. South Asian Archaeology 1, 537–551 (1979)

  22. 22.

    Nomadism in Iran: From Antiquity to the Modern Era. (Oxford Univ. Press, 2014)

  23. 23.

    Ancient Xinjiang between central Asia and China: the nomadic factor. Anthropol. Archeol. Eurasia 34, 87–101 (1996)

  24. 24.

    The centrality of central Asia. Stud. Hist. 8, 43–97 (1992)

  25. 25.

    Xiongnu ‘kings’ and the political order of the steppe empire. J. Econ. Soc. Hist. Orient 57, 1–43 (2014)

  26. 26.

    Inner Asian states and empires: theories and synthesis. J. Archaeol. Res. 20, 205–256 (2012)

  27. 27.

    Empires of the Silk Road: A History of Central Eurasia from the Bronze Age to the Present. (Princeton Univ. Press, 2009)

  28. 28.

    Nomads and the Outside World. 2nd edn (Univ. Wisconsin Press, 1994)

  29. 29.

    Pastoral nomads: some general observations based on research in Iran. J. Anthropol. Res. 58, 245–264 (2002)

  30. 30.

    & Kormovye resursy Kazakhstana [Fodder Resources of Kazakhstan] (Izd-vo AN SSSR, 1960)

  31. 31.

    in Digital Archaeology: Bridging Method and Theory (eds & ) 128–147 (Routledge, 2006)

  32. 32.

    , & New evidence for Bronze Age agricultural settlements in the Zhunge’er (Junggar) Basin, China. J. Field Archaeol. 36, 269–280 (2011)

  33. 33.

    , , , & Radical change and dietary conservatism: mixing model estimates of human diets along the Inner Asia and China’s mountain corridors. The Holocene 26, 1556–1565 (2016)

  34. 34.

    in Nomads in the Sedentary World Curzon-IIAS Asian Studies Series (eds & ) Ch. 10, 234–250 (Curzon, 2001)

  35. 35.

    , & Canals versus horses: political power in the oasis of Samarkand. World Archaeol. 41, 73–87 (2009)

  36. 36.

    et al. Land use patterns in central Asia. Step 1: the musical chairs model. J. Archaeol. Method Theory 21, 405–425 (2014)

  37. 37.

    Pastoralist Landscapes and Social Interaction in Bronze Age Eurasia. (Univ. California Press, 2008)

  38. 38.

    & Writ in water, lines in sand: ancient trade routes, models and comparative evidence. Cogent Arts & Humanities 2, (2015)

  39. 39.

    Transportation, boarding, lodging, and trade along the early Silk Road: a preliminary study of the Xuanquan manuscripts. J. Am. Orient. Soc. 135, 421–432 (2015)

  40. 40.

    et al. Early agriculture and crop transmission among Bronze Age mobile pastoralists of central Eurasia. Proc. R. Soc. Lond. B 281, 20133382 (2014)

  41. 41.

    Qijia and Seima-Turbino: the question of early contacts between northwest China and the Eurasian steppe. Museum of Far Eastern Antiquities bulletin 31–54, (2003)

  42. 42.

    Alternative complexities: the archaeology of pastoral nomadic states. J. Archaeol. Res. 22, 277–326 (2014)

  43. 43.

    The contingencies of state formation in eastern Inner Asia. Asian Perspect. 46, 249–274 (2007)

  44. 44.

    & Xiongnu Archaeology – Multidisciplinary Perspectives of the First Steppe Empire in Inner Asia in Bonn Contributions to Asian Archaeology 5 (ed. ) (Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, 2011)

  45. 45.

    et al. Middlemen and marcher states in central Asia and east/west empire synchrony. Soc. Evol. Hist. 9, 52–79 (2010)

  46. 46.

    Life Along the Silk Road. (Univ. California Press, 2015)

  47. 47.

    , & eMODIS: A user-friendly data source. Open-file Rep. (U.S. Geol. Surv.) 2010–1055 (2010)

  48. 48.

    Bronze Age Pastoral Landscapes of Eurasia and the Nature of Social Interaction in the Mountain Steppe Zone of Eastern Kazakhstan. PhD thesis, University of Pennsylvania, (2004)

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Acknowledgements

Funding for research at the SAIE laboratory was provided by Washington University in St. Louis (M.D.F.). C. Copp and M. Webb provided assistance with modelling and coding in the SAIE laboratory and GIS laboratory of Washington University in St. Louis. C. Chady assisted in copy editing. An early version of the pastoralist participation model was presented at the Advanced Seminar ‘New Geospatial Approaches in Anthropology’ at the School for Advanced Research, March 6–10, 2016. P. Daly, R. Pinhasi, G. Larson and D. Meltzer provided commentary on drafts of this article.

Author information

Affiliations

  1. SAIE Laboratory, Department of Anthropology, Washington University in St. Louis, 1 Brookings Drive, CB 1114, St. Louis, Missouri 63130, USA

    • Michael D. Frachetti
    •  & C. Evan Smith
  2. University Libraries, Washington University in St. Louis, 1 Brookings Drive, CB 1061, St. Louis, Missouri 63130, USA

    • Cynthia M. Traub
  3. Institute of Archaeology, University College London, 31–34 Gordon Square, London WC1H 0PY, UK

    • Tim Williams

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Contributions

M.D.F. conceptualized the study, designed, and executed the spatial model, and wrote the manuscript with editing and approval from C.E.S., T.W. and C.M.T. C.E.S. carried out spatial modelling and script coding in ArcGIS and Python. C.M.T. carried out statistical modelling and analysis of the results. T.W. provided the Silk Road site database and contributed to analysis and interpretation of the results. M.D.F. carried out spatial and statistical analysis and interpretation of the results with contributions and input from C.E.S., C.M.T. and T.W.

Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Michael D. Frachetti.

Reviewer Information Nature thanks D. Rogers and the other anonymous reviewer(s) for their contribution to the peer review of this work.

Extended data

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    Supplementary Information

    This file contains the Supplementary Discussion, Supplementary References, Supplementary Table 1, a link to the executable ArcPython script to run the PastPart model in ArcGIS and the statistical report providing comprehensive data and illustration of the range of statistical analysis carried out for this study.

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https://doi.org/10.1038/nature21696

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