I once watched a dominant baboon walk purposefully toward several members of the troop to bully them with snarls, slaps and bites. Baboons are well-known bullies. They use actual and threatened violence to climb the social ladder and then to cement their status as the most dominant animal. Male baboons bully (biologists prefer “harass”) for dominance because they want first dibs on the tastiest foods and opportunities for mating. Charles Darwin explained in Origin of Species that these are the drivers of evolution: food and sex. Full article