Oftedal, Olav Y. 2012. “The evolution of milk secretion and its ancient origins”. Animal 6 (3):355–368.
Oka, Rahul C., Marc Kissel, Mark Golitko, Susan Guise Sheridan, Nam C. Kim, AgustÍn Fuentes. 2017. “Population is the main driver of war group size and conflict casualties”. PNAS 114 (52):E11101–11110.
Okada, Daijiro, Paul M. Bingham. 2008. “Human uniqueness – selfinterest and social cooperation”. Journal of Theoretical Biology 253:261–270.
Orwell, George. 1938. Homage to Catalonia. London: Secker and Warburg.
Otterbein, Keith F. 1986. The Ultimate Coercive Sanction: A Cross-Cultural Study of Capital Punishment. New Haven, Conn.: HRAF Press.
Otterbein, Keith F. 2004. How War Began. College Station: Texas A&M University Press.
Overy, Richard. 2009. The Twilight Years: The Paradox of Britain Between the Wars. New York: Viking.
Painter, Nell Irvin. 2010. The History of White People. New York: W. W. Norton.
Palagi, Elisabetta. 2006. “Social play in bonobos (Pan paniscus) and chimpanzees (Pan troglodytes): Implications for natural social systems and interindividual relationships”. American Journal of Physical Anthropology 129:418–426.
Pallitto, Christina, Claudia GarcÍa-Moreno. 2013. “Intimate partner violence and its measurement: Global considerations”. In Family Problems and Family Violence, edited by Steven R. H. Beach, Richard E. Heyman, Amy Smith Slep, Heather M. Foran. New York: Springer, pp. 15–32.
Palombit, Ryne A. 2012. “Infanticide: Male strategies and female counterstrate gies”. In The Evolution of Primate Societies, edited by John C. Mitani, Josep Call, Peter M. Kappeler, Ryne A. Palombit, Joan B. Silk. Chicago: University of Chicago Press, pp. 432–468.
Paquin, Stephane, Eric Lacourse, Mara Brendgen, Frank Vitaro, Ginette Dionne, Richard E. Tremblay, Michel Boivin. 2014. “The genetic-environmental architecture of proactive and reactive aggression throughout childhood”. Monatsschrift für Kriminologie und Strafrechtsreform 97 (5–6):398–420.
Parish, Amy M. 1994. “Sex and food control in the ‘Uncommon Chimpanzee’: How bonobo females overcome a phylogenetic legacy of male dominance”. Ethology and Sociobiology 15:157–179.
Parry, Richard Lloyd. 1998. “What young men do”. Granta 62:83–124.
Payn, Graham, Sheridan Morley, eds. 1982. The Nöel Coward Diaries. London: Papermac.
Pearce, Eiluned, Chris Stringer, R. I. M. Dunbar. 2013. “New insights into differences in brain organization between Neanderthals and anatomically modern humans”. Proceedings of the Royal Society B 280:20130168.
Pendleton, Amanda L., Feichen Shen, Angela M. Taravella, Sarah Emery, Krishna R. Veeramah, Adam R. Boyko, Jeffrey M. Kidd. 2018. “Comparison of village dog and wolf genomes highlights the role of the neural crest in dog domestication”. BMC Biology, in press. doi:10.1186/s12915-018-0535-2.
Peplau, Letitia Anne, Adam W. Fingerhut. 2007. “The close relationships of lesbians and gay men”. Annual Review of Psychology 58:405–424.
Perry, Susan, Joseph H. Manson. 2008. Manipulative Monkeys: The Capuchins of Lomas Barbudal. Cambridge, Mass.: Harvard University Press.
Peterson, Dale. 2011. The Moral Lives of Animals. New York: Bloomsbury.
Phillips, Herbert P. 1965. Thai Peasant Personality: The Patterning of Interpersonal Behavior in the Village of Bang Chan. Berkeley: University of California Press.
Phillips, Tim, Jiawei Li, Graham Kendall. 2014. “The effects of extra-somatic weapons on the evolution of human cooperation towards non-kin”. PLoS ONE 9 (5):e95742.
Pickering, Travis R. 2013. Rough and Tumble: Aggression, Hunting and Human Evolution. Berkeley: University of California Press.
Pilbeam, David R., Daniel E. Lieberman. 2017. “Reconstructing the Last Common Ancestor of chimpanzees and humans”. In Chimpanzees and Human Evolution, edited by M. N. Muller, D. R. Pilbeam, R. W. Wrangham. Cambridge, Mass.: Harvard University Press, pp. 22–141.
Pilot, MaŁgorzata, Tadeusz Malewski, Andre E. Moura, Tomasz Grzybowski, Kamil Olenski, StanisŁaw Kaminski, Fernanda Ruiz Fadel et al. 2016. “Diver sifying selection between pure-breed and free-breeding dogs inferred from genome-wide SNP analysis”. Genes, Genomes and Genetics 6 (8):2285–2298.
Pinker, Steven. 2011. The Better Angels of Our Nature: Why Violence Has Declined. New York: Penguin.
Pinker, Steven. 2012. “The false allure of group selection”. https:// www. edge.org/ conversation/ the-false-allure-of-group-selection; doi:10.1002/ 9781119125563.evpsych236.
Plomin, Robert. 2014. “Genotype-environment correlation in the era of DNA”. Behavior Genetics 44:629–638.
Plyusnina, Irina Z., Maria Yu Solov’eva, Irina N. Oskina. 2011. “Effect of domestication on aggression in gray norway rats”. Behavior Genetics 41:583–592.
Polk, Kenneth. 1995. “Lethal violence as a form of masculine conflict resolution”. Australian and New Zealand Journal of Criminology 28:93–115.
Power, Margaret. 1991. The Egalitarians – Human and Chimpanzee: An Anthropo logical View of Social Organization. Cambridge, U. K.: Cambridge University Press.
Price, Edward O. 1999. “Behavioral development in animals undergoing domes tication”. Applied Animal Behaviour Science 65:245–271.
Pruetz, Jill D., Kelly Boyer Ontl, Elizabeth Cleaveland, Stacy Lindshield, Joshua Marshack, Erin G. Wessling. 2017. “Intragroup lethal aggression in West African chimpanzees (Pan troglodytes verus): Inferred killing of a former alpha male at Fongoli, Senegal”. International Journal of Primatology 38:31–57.
Prüfer, K., F. Racimo, N. Patterson, F. Jay, S. Sankararaman, S. Sawyer, A. Heinze et al. 2014. “The complete genome sequence of a Neanderthal from the Altai Mountains”. Nature 505:43–49.
Prüfer, Kay, Kasper Munch, Ines Hellmann, Keiko Akagi, Jason R. Miller, Brian Walenz, Sergey Koren et al. 2012. “The bonobo genome compared with the chimpanzee and human genomes”. Nature 486:527–531.
Pusey, Anne, Carson Murray, William Wallauer, Michael Wilson, Emily Wroblewski, Jane Goodall. 2008. “Severe aggression among female Pan troglodytes schweinfurthii at Gombe National Park, Tanzania”. International Journal of Primatology 29:949–973.
Pusey, Anne, Craig Packer. 1994. “Infanticide in lions: Consequences and coun terstrategies”. In Infanticide and Parental Care, edited by S. Parmigiani, F. von Saal. London: Harwood Academic Publishers, pp. 277–330.