Why is it that you think dudes who could kick your ass are huge, but you think dudes whose ass you could kick are teeny-tiny? Because you are not smart, haha, just playing, brother. You are not smart because of science.
A decade-long study of chimpanzees in Uganda appears to show that chimps wage war and annex territory, assembling into patrols and killing chimpanzees from other groups. On the other hand, baby chimps are really cute.