The Philosophy of Social Evolution

The study of how natural selection shapes social behaviour is an important sub-branch of evolutionary biology, but one that has been mired in controversy. Much of this controversy concerns "altruistic’’ behaviours, that is, behaviours that are costly for an organism to perform but benefit others, such as defending one’s colony from attack. Birch’s book offers a deft analysis of the seemingly intractable debates over social evolution, bringing considerable conceptual clarity. Topics discussed include the status of kin selection theory, Hamilton’s rule, cultural evolution, and the idea that a multicelled organism is itself a social group composed of cells.