Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Review Article
  • Published:

Legacy effects of religion, politics and war on urban evolutionary biology

Abstract

Urbanization has been a defining feature of the past four centuries, with most of the global population now living in highly modified environments shared with wildlife. Traditionally, biological urban evolutionary research has focused on physical factors such as habitat fragmentation, pollution and resource availability, often overlooking the social and political forces shaping urban environments. This Review explores how religion, politics and war drive urban wildlife evolution by shaping environmental conditions and selective pressures. We synthesize existing knowledge on these influences and propose testable hypotheses to advance the field. Understanding these dynamics is essential for explaining the variability in urban evolutionary processes and predicting the future development of urban systems. By integrating social and political dimensions, we can gain deeper insights into how cities shape the evolution of organisms that inhabit them.

This is a preview of subscription content, access via your institution

Access options

Buy this article

USD 39.95

Prices may be subject to local taxes which are calculated during checkout

Fig. 1: Religious sites and practices can affect the evolutionary potential of urban wildlife.
Fig. 2: Political systems affect urban design, including the amount and distribution of green areas across the urban matrix.
Fig. 3: War decreases tree cover in cities, which is likely to decrease gene flow and increase genetic drift.

Similar content being viewed by others

References

  1. Lambek, M. The anthropology of religion and the quarrel between poetry and philosophy. Curr. Anthropol. 41, 309–320 (2000).

    Article  Google Scholar 

  2. Kokosalakis, N. Legitimation power and religion in modern society. Sociol. Anal. 46, 367 (1985).

    Article  Google Scholar 

  3. Fox, J. Religion, Civilization, and Civil War: 1945 Through the New Millennium (Lexington Books, 2008).

  4. Huntington, S. P. The Clash of Civilizations and the Remaking of World Order (Simon and Schuster, 2007).

  5. Mearsheimer, J. J. The Tragedy of Great Power Politics updated edn (W. W. Norton, 2003).

  6. Klare, M. Resource Wars: The New Landscape of Global Conflict (Macmillan, 2002).

  7. Des Roches, S. et al. Socio-eco-evolutionary dynamics in cities. Evol. Appl. https://doi.org/10.1111/eva.13065 (2020).

  8. Darwin, C. On the Origin of Species (John Murray, 1859).

  9. Henderson, J. C. Urban parks and green spaces in Singapore. Manag. Leis. 18, 213–225 (2013).

    Google Scholar 

  10. Koh, J. J.-M., Rheindt, F. E., Ng, E. Y. X. & Webb, E. L. Evidence of genetic connectivity between fragmented pig populations in a tropical urban city-state. Raffles Bull. Zool. 67, 1431 (2019).

    Google Scholar 

  11. Johnson, M. T. J. & Munshi-South, J. Evolution of life in urban environments. Science 358, eaam8327 (2017).

    Article  Google Scholar 

  12. Burchardt, M. & Becci, I. in Topographies of Faith: Religion in Urban Spaces (eds Becci, I. et al.) 1–21 (Brill, 2013).

  13. Pew Research Center. The Changing Global Religious Landscape (Pew Research Center, 2017).

  14. Ormsby, A. A. Diverse values and benefits of urban sacred natural sites. Trees For. People 6, 100136 (2021).

    Article  Google Scholar 

  15. Voeks, R. in African Ethnobotany in the Americas (eds Voeks, R. & Rashford, J.) 395–416 (Springer, 2013).

  16. Mukonyora, I. Wandering a Gendered Wilderness: Suffering & Healing in an African Initiated Church (Peter Lang, 2007).

  17. Malcomess, B. & Wilhelm-Solomon, M. in Routes and Rites to the City. Global Diversities (eds Wilhelm-Solomon, M. et al.) 31–60 (Palgrave Macmillan, 2016).

  18. Bhagwat, S. A. & Rutte, C. Sacred groves: potential for biodiversity management. Front. Ecol. Environ. 4, 519–524 (2006).

    Article  Google Scholar 

  19. Itescu, Y. & Jeschke, J. M. Assessing the conservation value of cemeteries to urban biota worldwide. Conserv. Biol. 38, e14322 (2024).

    Article  Google Scholar 

  20. Borde, R., Ormsby, A. A., Awoyemi, S. M. & Gosler, A. G. Religion and Nature Conservation: Global Case Studies (Taylor & Francis, 2022).

  21. D’hondt, B., Breyne, P., Van Landuyt, W. & Hoffmann, M. Genetic analysis reveals human-mediated long-distance dispersal among war cemeteries in Trifolium micranthum. Plant Ecol. 213, 1241–1250 (2012).

    Article  Google Scholar 

  22. Caspermeyer, J. Holy chickens: did medieval religious rules drive domestic chicken evolution? Mol. Biol. Evol. 34, 2123–2124 (2017).

  23. Sahu, B. K., Parganiha, A. & Pati, A. K. A population estimation study reveals a staggeringly high number of cattle on the streets of urban Raipur in India. PLoS ONE 16, e0234594 (2021).

    Article  Google Scholar 

  24. Langton, J. Rat: How the World’s Most Notorious Rodent Clawed Its Way to the Top (Macmillan, 2007).

  25. Everard, M., Pinder, A. C., Raghavan, R. & Kataria, G. Are well‐intended Buddhist practices an under‐appreciated threat to global aquatic biodiversity? Aquat. Conserv. Mar. Freshw. Ecosyst. 29, 136–141 (2019).

    Article  Google Scholar 

  26. Liu, X., McGarrity, M. E., Bai, C., Ke, Z. & Li, Y. Ecological knowledge reduces religious release of invasive species. Ecosphere 4, 1–12 (2013).

    Article  Google Scholar 

  27. Crosby, A. W. Ecological Imperialism: The Biological Expansion of Europe 900–1900 (Cambridge Univ. Press, 2004).

  28. Graeber, D. & Wengrow, D. The Dawn of Everything: A New History of Humanity (Penguin, 2021).

  29. Sheppard, E. in The Routledge Handbook on Cities of the Global South (eds Parnell, S. & Oldfield, S.) ch. 15 (Routledge, 2014).

  30. Hancock, J. F. in World Agriculture Before and After 1492: Legacy of the Columbian Exchange (ed. Hancock, J. F.) 31–50 (Springer, 2022).

  31. Mena, F. C. Ciudad, Memoria y Proyecto (Distrito Metropolitano, 2010).

  32. Shackleton, C. M. et al. eds. Urban Ecology in the Global South (Springer, 2021).

  33. Akama, J. S., Lant, C. L. & Burnett, G. W. A political-ecology approach to wildlife conservation in Kenya. Environ. Values 5, 335–347 (1996).

    Article  Google Scholar 

  34. Thomas, D. London’s green belt: the evolution of an idea. Geogr. J. 129, 14–24 (1963).

    Article  Google Scholar 

  35. Goad, E. H., Pejchar, L., Reed, S. E. & Knight, R. L. Habitat use by mammals varies along an exurban development gradient in northern Colorado. Biol. Conserv. 176, 172–182 (2014).

    Article  Google Scholar 

  36. Schell, C. J. et al. The ecological and evolutionary consequences of systemic racism in urban environments. Science 369, eaay4497 (2020).

    Article  Google Scholar 

  37. Schmidt, C. & Garroway, C. Systemic racism alters wildlife genetic diversity. Proc. Natl Acad. Sci. USA 119, e2102860119 (2022).

    Article  Google Scholar 

  38. Schüle, S. A., Gabriel, K. M. A. & Bolte, G. Relationship between neighbourhood socioeconomic position and neighbourhood public green space availability: an environmental inequality analysis in a large German city applying generalized linear models. Int. J. Hyg. Environ. Health 220, 711–718 (2017).

    Article  Google Scholar 

  39. de Vries, S., Buijs, A. E. & Snep, R. P. H. Environmental justice in the Netherlands: presence and quality of greenspace differ by socioeconomic status of neighbourhoods. Sustainability 12, 5889 (2020).

    Article  Google Scholar 

  40. Rothstein, R. The Color of Law: A Forgotten History of How Our Government Segregated America (Liveright, 2017).

  41. Cozens, P. & Love, T. A review and current status of crime prevention through environmental design (CPTED). J. Plan. Lit. 30, 393–412 (2015).

    Article  Google Scholar 

  42. Nielsen, A. B., Van Den Bosch, M., Maruthaveeran, S. & van den Bosch, C. K. Species richness in urban parks and its drivers: a review of empirical evidence. Urban Ecosyst. 17, 305–327 (2014).

    Article  Google Scholar 

  43. Schierhorn, F. et al. Post‐Soviet cropland abandonment and carbon sequestration in European Russia, Ukraine, and Belarus. Glob. Biogeochem. Cycles 27, 1175–1185 (2013).

    Article  Google Scholar 

  44. Ravenscroft, E. The meaning of the peacelines of Belfast. Peace Rev. 21, 213–221 (2009).

    Article  Google Scholar 

  45. Slatkin, M. Gene flow and selection in a cline. Genetics 75, 733–756 (1973).

    Article  Google Scholar 

  46. Stillfried, M. et al. Do cities represent sources, sinks or isolated islands for urban wild boar population structure? J. Appl. Ecol. 54, 272–281 (2017).

    Article  Google Scholar 

  47. Barthel, L. M. F. et al. Unexpected gene-flow in urban environments: the example of the European hedgehog. Animals 10, 2315 (2020).

    Article  Google Scholar 

  48. Pettersson, T. & Wallensteen, P. Armed conflicts, 1946–2014. J. Peace Res. 52, 536–550 (2015).

    Article  Google Scholar 

  49. Gaynor, K. M. et al. War and wildlife: linking armed conflict to conservation. Front. Ecol. Environ. 14, 533–542 (2016).

    Article  Google Scholar 

  50. Weir, D. et al. Conservation policies must address an overlooked issue: how war affects the environment. Nature 634, 538–541 (2024).

    Article  Google Scholar 

  51. Jarić, I. et al. iEcology: harnessing large online resources to generate ecological insights. Trends Ecol. Evol. 35, 630–639 (2020).

    Article  Google Scholar 

  52. Smith, A. F. & Kuzo, H. Social media reveals unseen interactions with wildlife during Russia’s full-scale invasion of Ukraine. Conserv. Sci. Pract. 6, e13197 (2024).

    Article  Google Scholar 

  53. Quist, M. C., Fay, P. A., Guy, C. S., Knapp, A. K. & Rubenstein, B. N. Military training effects on terrestrial and aquatic communities on a grassland military installation. Ecol. Appl. 13, 432–442 (2003).

    Article  Google Scholar 

  54. Hanson, T. Biodiversity conservation and armed conflict: a warfare ecology perspective. Ann. N. Y. Acad. Sci. 1429, 50–65 (2018).

    Article  Google Scholar 

  55. Büscher, K., Komujuni, S. & Ashaba, I. in Urban Africa and Violent Conflict (ed. Büscher, K.) 156–174 (Taylor & Francis, 2020).

  56. Grant, P. R. et al. Evolution caused by extreme events. Phil. Trans. R. Soc. B 372, 20160146 (2017).

    Article  Google Scholar 

  57. Collier, P. On the economic consequences of civil war. Oxf. Econ. Pap. 51, 168–183 (1999).

    Article  Google Scholar 

  58. Lacan, I. & McBride, J. R. War and trees: the destruction and replanting of the urban and peri-urban forest of Sarajevo, Bosnia and Herzegovina. Urban For. Urban Green. 8, 133–148 (2009).

    Article  Google Scholar 

  59. Honnay, O., Jacquemyn, H., Bossuyt, B. & Hermy, M. Forest fragmentation effects on patch occupancy and population viability of herbaceous plant species. New Phytol. 166, 723–736 (2005).

    Article  Google Scholar 

  60. Villasenor, N. R., Chiang, L. A., Hernández, H. J. & Escobar, M. A. Vacant lands as refuges for native birds: an opportunity for biodiversity conservation in cities. Urban For. Urban Green. 49, 126632 (2020).

    Article  Google Scholar 

  61. Brady, L. M. Life in the DMZ: turning a diplomatic failure into an environmental success. Dipl. Hist. 32, 585–611 (2008).

    Google Scholar 

  62. Kim, K. C. Preserving biodiversity in Korea’s demilitarized zone. Science 278, 242–243 (1997).

    Article  Google Scholar 

  63. Brady, L. M. From war zone to biosphere reserve: the Korean DMZ as a scientific landscape. Not. Rec. R. Soc. Lond. 75, 189–205 (2021).

    Article  Google Scholar 

  64. Löki, V., Deák, B., Lukács, A. B. & Molnár, A. Biodiversity potential of burial places—a review on the flora and fauna of cemeteries and churchyards. Glob. Ecol. Conserv. 18, e00614 (2019).

    Google Scholar 

  65. Angeoletto, F., Tryjanowski, P. & Fellowes, M. Ecology of Tropical Cities: Natural and Social Sciences Applied to the Conservation of Urban Biodiversity (Springer, 2025).

  66. Green, L. Rock | Water | Life: Ecology and Humanities for a Decolonial South Africa (Duke Univ. Press, 2020).

  67. Coudeville, L. et al. Disease transmission and mass gatherings: a case study on meningococcal infection during Hajj. BMC Infect. Dis. 22, 275 (2022).

    Article  Google Scholar 

  68. Agustiningsih, A., Indalao, I. L., Pangesti, K. A., Sukowati, C. H. C. & Ramadhany, R. Molecular characterization of influenza A/H3N2 virus isolated from Indonesian Hajj and Umrah pilgrims 2013 to 2014. Life 13, 1100 (2023).

    Article  Google Scholar 

  69. Magellan, K. Prayer animal release: an understudied pathway for introduction of invasive aquatic species. Aquat. Ecosyst. Health Manag. 22, 452–461 (2020).

    Article  Google Scholar 

  70. Deng, T. et al. New record of the invasive red-eared slider Trachemys scripta elegans (Wied, 1838) on the Qinghai-Tibetan Plateau, China. BioInvasions Rec. 10, 969–976 (2021).

    Article  Google Scholar 

  71. Legras, J.-L., Merdinoglu, D., Cornuet, J.-M. & Karst, F. Bread, beer and wine: Saccharomyces cerevisiae diversity reflects human history. Mol. Ecol. 16, 2091–2102 (2007).

    Article  Google Scholar 

  72. Marsit, S. & Dequin, S. Diversity and adaptive evolution of Saccharomyces wine yeast: a review. FEMS Yeast Res. 15, fov067 (2015).

    Article  Google Scholar 

  73. Carneiro, M. et al. The genetic structure of domestic rabbits. Mol. Biol. Evol. 28, 1801–1816 (2011).

    Article  Google Scholar 

  74. Lourenço, A., Álvarez, D., Wang, I. J. & Velo-Antón, G. Trapped within the city: integrating demography, time since isolation and population-specific traits to assess the genetic effects of urbanization. Mol. Ecol. 26, 1498–1514 (2017).

    Article  Google Scholar 

  75. Takagi, T. et al. A historic religious sanctuary may have preserved ancestral genetics of Japanese sika deer (Cervus nippon). J. Mammal. 104, 303–315 (2023).

    Article  Google Scholar 

  76. Bell, M. L. & Ebisu, K. Environmental inequality in exposures to airborne particulate matter components in the United States. Environ. Health Perspect. 120, 1699–1704 (2012).

    Article  Google Scholar 

  77. Deener, A. The origins of the food desert: urban inequality as infrastructural exclusion. Soc. Forces 95, 1285–1309 (2017).

    Google Scholar 

  78. Bunin, G. R., Tseng, M., Li, Y., Meadows, A. T. & Ganguly, A. Parental diet and risk of retinoblastoma resulting from new germline RB1 mutation. Environ. Mol. Mutagen. 53, 451–461 (2012).

    Article  Google Scholar 

  79. Zmelik, K., Schindler, S. & Wrbka, T. The European Green Belt: international collaboration in biodiversity research and nature conservation along the former Iron Curtain. Innov. Eur. J. Soc. Sci. 24, 273–294 (2011).

    Google Scholar 

  80. Whitehead, A., Clark, B. W., Reid, N. M., Hahn, M. E. & Nacci, D. When evolution is the solution to pollution: key principles, and lessons from rapid repeated adaptation of killifish (Fundulus heteroclitus) populations. Evol. Appl. https://doi.org/10.1111/eva.12470 (2017).

  81. Balto, S. The road to inequality: how the federal highway program polarized America and undermined cities. J. Interdiscip. Hist. 49, 691–693 (2019).

    Article  Google Scholar 

  82. Riley, S. P. D. et al. A Southern California freeway is a physical and social barrier to gene flow in carnivores. Mol. Ecol. 15, 1733–1741 (2006).

    Article  Google Scholar 

  83. Kodaira, M., Izumi, S., Takahashi, N. & Nakamura, N. No evidence of radiation effect on mutation rates at hypervariable minisatellite loci in the germ cells of atomic bomb survivors. Radiat. Res. 162, 350–356 (2004).

    Article  Google Scholar 

  84. Dubrova, Y. E. et al. Human minisatellite mutation rate after the Chernobyl accident. Nature 380, 683–686 (1996).

    Article  Google Scholar 

  85. Ellegren, H., Lindgren, G., Primmer, C. R. & Møller, A. P. Fitness loss and germline mutations in barn swallows breeding in Chernobyl. Nature 389, 593–596 (1997).

    Article  Google Scholar 

  86. Kovalchuk, I., Kovalchuk, O., Arkhipov, A. & Hohn, B. Transgenic plants are sensitive bioindicators of nuclear pollution caused by the Chernobyl accident. Nat. Biotechnol. 16, 1054–1059 (1998).

    Article  Google Scholar 

  87. Lewis, C. & Galloway, T. Sperm toxicity and the reproductive ecology of marine invertebrates. Integr. Environ. Assess. Manag. 6, 188–190 (2010).

    Article  Google Scholar 

  88. Dubrova, Y. E. et al. Nuclear weapons tests and human germline mutation rate. Science 295, 1037–1037 (2002).

    Article  Google Scholar 

  89. Lukash, O., Miroshnyk, I. & Boiko, V. The invasive species of the Chernihiv city flora (Ukraine). Biota Hum. Technol. 1, 7–19 (2022).

    Google Scholar 

  90. Gouz, G. V. & Timoshenkova, V. V. The first record of Sporobolus cryptandrus (Poaceae) for Ukraine and new records for southeastern Ukraine from Triokhizbensky Steppe. Ukr. Bot. J. 74, 64–70 (2017).

    Article  Google Scholar 

  91. Mioduchowska, M. et al. Notes on genetic uniformity in the fairy shrimp Branchipus schaefferi Fischer, 1834 (Branchiopoda, Anostraca) from Poland. Northwest J. Zool. 14, 127–129 (2018).

    Google Scholar 

  92. Maier, G., Hössler, J. & Tessenow, U. Succession of physical and chemical conditions and of crustacean communities in some small, man made water bodies. Int. Rev. Hydrobiol. 83, 405–418 (1998).

    Article  Google Scholar 

  93. Russell, C. J. G., Franco, A. M. A., Atkinson, P. W., Väli, Ü. & Ashton-Butt, A. Active European warzone impacts raptor migration. Curr. Biol. 34, 2272–2277.e2 (2024).

    Article  Google Scholar 

  94. Campbell-Staton, S. C. et al. Ivory poaching and the rapid evolution of tusklessness in African elephants. Science 374, 483–487 (2021).

    Article  Google Scholar 

  95. Krypton, C. The siege of Leningrad. Russ. Rev. 13, 255–265 (1954).

    Article  Google Scholar 

  96. Benjamin-Fink, N. in Wildlife Population Monitoring (ed. Ferretti, M.) ch. 8 (Intech Open, 2019).

  97. Ferreira Da Silva, M. J. et al. Assessing the impact of hunting pressure on population structure of Guinea baboons (Papio papio) in Guinea-Bissau. Conserv. Genet. 15, 1339–1355 (2014).

    Article  Google Scholar 

  98. Steeves, T. E., Johnson, J. A. & Hale, M. L. Maximising evolutionary potential in functional proxies for extinct species: a conservation genetic perspective on de-extinction. Funct. Ecol. 31, 1032–1040 (2017).

    Article  Google Scholar 

  99. Frankham, R. Genetics and extinction. Biol. Conserv. 126, 131–140 (2005).

    Article  Google Scholar 

  100. Kimura, M. On the evolutionary adjustment of spontaneous mutation rates. Genet. Res. 9, 23–34 (1967).

    Article  Google Scholar 

Download references

Acknowledgements

This collaboration resulted from discussions within the Urban Eco-Evo Research Coordination Network funded by NSF, award number DBE-1840663. We thank C. Car for feedback on the war section, and A. Gosler, A. M. McMahon, C. J. Schell, C. Schmidt and members of the Losos lab for feedback on earlier versions of this paper.

Author information

Authors and Affiliations

Authors

Contributions

M.S. conceived the paper with input from E.J.C. and C.J.G. E.J.C. and M.S. collaboratively developed the overarching themes, and E.J.C., A.E.C., Z.J., H.K. and J.M.-S. coordinated the writing of individual sections. All authors contributed to the development of the paper, including literature reviews and writing.

Corresponding authors

Correspondence to Elizabeth J. Carlen, Colin J. Garroway or Marta Szulkin.

Ethics declarations

Competing interests

The authors declare no competing interests.

Peer review

Peer review information

Nature Cities thanks Charles Nilon and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.

Additional information

Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Carlen, E.J., Caizergues, A.E., Jagiello, Z. et al. Legacy effects of religion, politics and war on urban evolutionary biology. Nat Cities 2, 593–602 (2025). https://doi.org/10.1038/s44284-025-00249-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • Version of record:

  • Issue date:

  • DOI: https://doi.org/10.1038/s44284-025-00249-3

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing