Is Aggression Inborn Or It Is A Response To Frustration?

Is Aggression Inborn Or It Is A Response To Frustration? According to Yale Group, frustration is the “condition which exists when a goal-response suffers interference,” while aggression is defined as “an act whose goal-response is injury to an organism (or organism surrogate).” However, aggression is not always the response to frustration. Is aggression inborn or