Rudolf Dreikurs

He suggested that human misbehavior is the result of feeling a lack of belonging to one's social group. When this happens the child acts from one of four "mistaken goals": undue attention, power, revenge or avoidance (inadequacy). His overall goal was that students would learn to cooperate reasonably without being penalized or rewarded because they would feel that they are valuable contributors to the classroom.

In 1952, Dreikurs organized a group of followers of Adlerian Psychology to found the North American Society of Adlerian Psychology. He was an active leader in the organization until his death.