"Group selection" is the controversial theory that natural selection operates not just at the individual level but also at the level of the social group. I recently participated in a conversation at ...

The evolution of multicellularity is one of the major transitions in evolution. It has occurred independently more than 25 times across different branches of life. Complex multicellular organisms, ...

“Although a high standard of morality gives but a slight or no advantage to each individual man and his children over the other men of the same tribe...an advancement in the standard of morality will ...

Introduction, by G. C. Williams.--Altruistic behavior and social organization: On the effects of selection on social insects, by A. H. Sturtevant. The genetical evolution of social behavior, I., by W.