Erik Erikson 

After spending some time traveling throughout Europe, Erik Erikson studied psychoanalysis from Anna Freud and earned a certificate from the Vienna Psychoanalytic Society. Erikson moved to the United States in 1933 and was offered a teaching position at Harvard Medical School. In addition to this, he also had a private practice in child psychoanalysis. Later, he held teaching positions at University of California at Berkeley, Yale, San Francisco Psychoanalytic Institute, Austen Riggs Center, and Center for Advanced Studies of the Behavioral Sciences. He published a number of books on his theories and research, including Childhood and Society and The Life Cycle Completed. His book Gandhi's Truth was awarded a Pulitzer Prize and a national Book Award.

Erik Erikson was the guy who came up with the Stages of Devlopment:

1) Infancy: Birth to 18 Months - Ego Development Outcome: Trust vs. Mistrust

2) Early Childhood: 18 Months to 3 Years - Ego Development Outcome: Autonomy vs. Shame

3) Play Age: 3 to 5 Years - Ego Development Outcome: Initiative vs. Guilt

4) School Age: 6 to 12 Years - Ego Development Outcome: Industry vs. Inferiority

5) Adolescence: 12 to 18 Years - Ego Development Outcome: Identity vs. Role Confusion

6) Young adulthood: 18 to 35 - Ego Development Outcome: Intimacy and Solidarity vs. Isolation

7) Middle Adulthood: 35 to 55 or 65 - Ego Development Outcome: Generativity vs. Self absorption or Stagnation

8) Late Adulthood: 55 or 65 to Death - Ego Development Outcome: Integrity vs. Despair

Erik Erikson by Dancing with Fire September 6, 2011