One of them is that he completely ignored the influences of learning and cultural factors that can influence aggression and focused exclusively on biological factors. It has been shown that cultural differences play a very important role in determining the acceptability of the degree and type of aggression. Siann (1985) also criticized Lorenze's theory as he believed that humans are naturally "hunter-gatherers" who rarely come into contact with others rather than "warriors" as suggested. Lea (1984) also refuted Lorenze's claim that nonhuman aggression ends before an animal of the same species is killed, pointing out cases such as when a lion takes over a new pride and kills any male cubs. Another theory of aggression is social learning theory, which proposes that "aggressive behavior is learned through reinforcement and imitation of aggressive models." (Bandura, 1965, P.501) Social learning theorists do not consider aggression to be innate, but believe that it is all learned behavior. Humans learn aggressive behavior by observing others behave aggressively. They observe in which situations aggressive behavior is rewarded (vicarious reinforcement) and when it is punished and as such they learn which aggressive behaviors they can imitate to be rewarded and which not to repeat so as not to be