In this talk, Dr. Curtis Marean argues for another food-related milestone: the turn toward foraging dense and predictable food resources. This shift in behavior led to elevated levels of group territoriality and conflict, which may have provided the ideal conditions for the evolution of the hyper-cooperative behaviors unique to modern humans. This coupled with the uses of newly invented projectile weapons contributed greatly to our ancestors’ ability to spread rapidly throughout the world, eliminating other competitors and driving many prey species to extinction.