DR. MAYNARD SMITH'S communication raises a good many more questions than I can attempt to answer here. The major obstacle to constructive discussion between us really arises from the understandable ...

A battle is being waged over kin and kind: Did cooperation evolve in humans and other animals because it helped relatives? Or because it promoted group living? A school of thought known as inclusive ...

Natural selection favors people who help close kin at their own expense: It can increase the odds the family’s genes are passed to future generations. But why assist distant relatives? Mathematical ...