Back in his lab, Provine shows me video footage of a pair of young chimps named Josh and Lizzie playing with a human caretaker. (discovermagazine.com)
Young chimps just make the transition with mother chimp jumping in to intervene if the males were too rough with the initiates, but in humans rituals were created to make a stark delineation between men and children. (sbnation.com)
The patterns of collective violence in which young chimp males engage are remarkably similar to those of young human males. (discovermagazine.com)