Freud Psychoanalytical approach to development. He focuses on the development and interaction of id, ego, and superego. For the definitive guide to internet resources on Sigmund Freud. Here is a real good Bio on Freud. Be sure to follow the links for good biographies of many diverse people.
Psychological health is goal of development and is attainable.
This is the best site for Erik Erikson. Be sure to follow all the links. Focus on the eight stages. Learning takes place through observation and modeling of the behaviors of others. We learn what we see.