Adler, Freud, and Jung were the key figures in the development of psychology as we know it. Yet, while Freud and Jung are widely studied and debated, Adler is far less well known. Nonetheless, as Loren Grey demonstrates, some of Adler's novel early precepts are valuable tools for personality diagnosis, even to this day. Examples include his belief in the social equality of all human beings, regardless of race, position, class, or gender; that all...