DeCarvalho narrates the institutionalization of the humanistic current in American psychology and places the thinking of five of its founders in the context of 20th century psychology. This intellectual history includes chronological bibliographies of the five founders: Gordon Allport, Abraham Maslow, Carl Rogers, Rollo May, and James Bugental. The book examines their revolt against behaviorism and psychoanalysis, and explains the impact that the neo-Freudians, existentialism, Kurt Goldstein, personality, and Gestalt psychologies had on the conceptualization of their humanistic psychologies.