Although, hostile and instrumental aggression are often expressed in today’s society, they would not be recognized without the theories surrounding aggression. The first theory was proposed by Konrad Lorenz. Lorenz suggested that “aggression was innate, an inherited fighting instinct, as significant in humans as it was in other animals ." He argued that due to the suppression of this aggressive intuition, it gave these instincts that chance to build up until there was an impulse of explosive violence.

Sigmund Freud, the creator of the psychoanalytic drive theory, agreed with Konrad Lorenz by saying, “All humans possessed an aggressive drive from birth, which, together with the sexual drive, contributed to personality development, and found expression in behavior;" however, he later departs when assuming that the human body is embodied with two drives that constitute the source of human behavior. These two embodied drives are Eros and Thanatos, which means, aggression is directed both outwards against others and inwards against oneself .

Despite the fact that both Konrad Lorenz and Sigmund Freud believe that humans are born with aggressive behaviors, many psychoanalysts still argue that aggression is a basic reaction to frustration. However, though, psychoanalysts argue against Freud and Lorenz and Lorenz and Freud believe that humans are born with aggressive behaviors; Albert Bandura believes that aggression is learned not something you’re born with.

Konrad Lorenz 

Sigmund Freud  

Albert Bandura 

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