Bob Trivers just won the Crafoord Prize in bioscience! For those who would like to become more familiar with Trivers' work, I highly recommend Natural Selection and Social Theory. Genes in Conflict is also a good read if you want some molecular level evolutionary exposition. Finally, Trivers looms large in both Mother Nature and Defenders of the Truth. If you don't know anyting about Trivers, I suggest this Edge Special Event.