This paper reviews many prominent
personality theories: William James, Carl Jung, Sigmund Freud, Abraham Maslow, Alfred Adler,
Margaret Mahler, Otto Kernberg, Buddhists, Carl Rogers, Heinz Kohut, Erik Erikson, Karen Horney, Albert Bandura and Rollo May. The author believes that these
theories are broad and simply defined, but there is not yet a collective theory of
personality that can be applied to everyone.