The document discusses different theories of aggression, including the instinct theory and social learning theory. According to the instinct theory, aggression is innate and can be channeled into more socially acceptable behaviors like sports. The social learning theory posits that aggression is learned through observation and reinforcement of aggressive behaviors. Bandura's bobo doll experiment showed children imitated aggressive behaviors they observed in adults towards dolls. Aggression can be learned in sports through observing and being rewarded for aggressive play.