Happiness in life depends to a considerable extent on the degree of social interest and ability to cooperate which the child has developed, with the help and encouragement of his parents and teachers. Successful men and woman are those who have learned the art of cooperation, and who face life with that attitude – an attitude born of courage and self-confidence. Such a person faces difficulties head-on, but is not plunged into despondency and despair by defeat or failure. His life- style is characterized by an easy approach to life, the absence of over-anxiety and a friendly tolerance towards his fellows. The need to escape into neurosis is very small.
Along with Freud and Jung, Adler was one of the founding giants in the field of ideas. Adler, Freud, and Jung were the key figures in the development of psychology as we know it.