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


