In the last few decades, new sources of evidence have continued to indicate that male violence has played an important role in shaping behavior in the human lineage. The frequency and nature of such violence varies widely among populations and over time raises questions about the factors responsible for the variation. This symposium takes a fresh look at the causes and consequences of variation in aggression, both between and within species. Christopher Boehm (USC) begins with a discussion about Warfare and Feuding in Pleistocene Societies, followed by Patricia Lambert (Utah State Univ) on Bioarchaeological Perspectives on Male Violence in Prehistory, and Kim Hill (Arizona State Univ) on Male Violence among the Aché and Hiwi Hunter-Gatherers. Recorded on 05/16/2014. (#28344)