Chimpanzee Politics: Power and Sex Among Apes - Frans de Waal
A truly fascinating elucidation of the mechanisms of power, affinity, aggression, reconciliation, and manipulation among a colony of chimpanzees at a zoo. What struck me was the flexibility and calculation of the interactions. Socialization and learning also played a large part. Also, there was remarkable flexibility in gender roles, as particularly illustrated by the story of Mama; to say that males "naturally" rule is oversimplified.