Śmiertelność wśród ludów zbieracko-łowieckich: Gurven, M., & Kaplan, H., 2007 Longevity Among Hunter-Gatherers: A Cross-Cultural Examination, Population and Development Review
Odsetek morderstw i dzieciobójstwo: https://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate War, Peace and Human Nature: The Convergence of Evolutionary and Cultural Views edited by Douglas P. Fry, 2013 Hill, K., et al., 2007 High adult mortality among Hiwi hunter-gatherers: Implications for human evolution, Journal of Human Evolution Hurtado, A.M., & Hill, K., 1996, Ache Life History: The Ecology and Demography of Foraging People. New York. Routledge
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