A Darwinian Left: Politics, Evolution and Cooperation is a 1999 book by the philosopher Peter Singer.

For example, Singer argues that the Left's view of human nature as highly malleable, which he identifies with Marxism and the standard social science model, is incorrect.

Singer argues that evolutionary psychology suggests that humans naturally tend to be self-interested.

He concludes that game theory (the mathematical study of strategy) and experiments in psychology offer hope that self-interested people will make short-term sacrifices for the good of others, if society provides the right conditions.

[2] The philosopher Peter Amato writes that "Singer's characterizations of the Left unfortunately distort and deny its variety and the complexity of the issues Leftists are concerned with", and that his "Darwinist anti-Marxism is based on an ideological oversimplification of both positions".