Why there might not be an evolutionary explanation for psychological altruism

• The distinction between psychological and biological altruism.
• The role of ultimate desires in psychological altruism.
• The best empirical evidence for psychological altruism.
• Why there may be no evolutionary explanation for psychological altruism.

The existence of psychological altruism is hotly debated in the psychological and philosophical literature. In this paper I argue that even if psychological altruism does exist in some (or all) human groups, there may be no purely evolutionary explanation for existence of psychological altruism.