Core Morenean philosophy is covered in this chapter as it relates to social work philosophy. The existential and spiritual philosophies from which sociometry and psychodrama emerged are comprehensively depicted including his theory of human nature, the encounter, the Godhead, the autonomous healing center within, spontaneity–creativity theory, the here-and-now, action theory, role theory, and psychodrama’s developmental theory. Attention is given to the biopsychosocial -spiritual nature of both social work and psychodrama’s conceptualizations. The intersection of Morenean philosophy is presented with each of the six core social work values—the centrality of human relationships, the dignity and worth of each person, social justice , service, competence, and integrity.