Background reading
Tooby, J., and L. Cosmides (1992). The Psychological Foundations of Culture. The Adapted Mind: Evolutionary Psychology and the Generation of Culture. Jerome H. Barkow, Leda Cosmides and John Tooby. New York, Oxford University Press: 19-136.

Dawkins, R. (1976). The Selfish Gene. Oxford, Oxford University Press.

Pinker, S. (1997). How the Mind Works. New York, W W Norton.

Popular overviews
de Waal, F. (1996). Good Natured: The Origins of Right and Wrong in Humans and Other Animals. Cambridge, Massachusetts, Harvard University Press.

Ridley, M. (1996). The Origins of Virtue, Penguin.

Kin altruism
Hamilton, W. D. (1964). "The Genetical Evolution of Social Behaviour." Journal of Theoretical Biology 7: 1-16, 17-52.

Daly, M., and M. Wilson (1988). Homicide. New York, Aldine de Gruyter.

Trivers, R. L. (1974). "Parent-Offspring Conflict." American Zoologist 14: 249-64.

Coordination/mutualism
Tooby, J., and L. Cosmides (1996). Friendship and the Banker's Paradox: Other Pathways to the Evolution of Adaptation for Altruism. Evolution of Social Behaviour Patterns in Primates and Man: A Joint Discussion Meeting of the Royal Society and the British Academy (Proceedings of the British Academy 88). W G Runciman, John Maynard Smith and Robin I M Dunbar, British Academy/Oxford University Press.

Hamilton, W. D. (1971). "Geometry for the Selfish Herd." Journal of Theoretical Biology 31: 295-311.

Reciprocity
Axelrod, R. (1984). The Evolution of Cooperation. New York, Basic Books.

Cosmides, L., and J. Tooby (1992). Cognitive Adaptations for Social Exchange. The Adapted Mind: Evolutionary Psychology and the Generation of Culture. J Barkow, L Cosmides and J Tooby. New York, Oxford University Press: 163-228.

Trivers, R. L. (1971). "The Evolution of Reciprocal Altruism." Quarterly Review of Biology 46: 35-57.

Conflict resolution: fair division, ritual contests, prior ownership
Maynard Smith, J., and G. R. Price (1973). "The Logic of Animal Conflict." Nature 246: 15-18.

Skyrms, B. (1996). Evolution of the Social Contract. Cambridge, Cambridge University Press.

Miller, G. F. (2000). The Mating Mind. London, William Heinemann (Chapter 9).

Sexual morality
Symons, D. (1979). The Evolution of Human Sexuality. New York, Oxford University Press.

Religion and morality
Boyer, P. (2001). Religion Explained: The Human Instincts That Fashion Gods, Spirits and Ancestors. London, William Heinnemann.