A champion of an early form of anti-psychiatry and sexual liberation, he also developed an anarchist form of depth psychology (which rejected the civilising necessity of psychological repression proposed by Freud). He adopted a modified form of the proto-feminist and neo-pagan theories of Johann Jakob Bachofen, with which he attempted to return civilization to a 'golden age' of non-hierarchy. Gross was ostracized from the larger psychoanalytic movement, and was not included in histories of the psychoanalytic and psychiatric establishments. He died in poverty.