The document discusses the social psychological theories of Karen Horney and Harry Stack Sullivan, highlighting their contributions to neo-Freudian thought and interpersonal psychoanalysis. Horney critiqued Freud's concepts, introducing ideas about neurosis resulting from basic anxiety in interpersonal relationships, while Sullivan emphasized the role of loneliness and interpersonal dynamics in mental health. Both theorists focused on the importance of relationships and the influence of societal factors on individual psychology.