D. W. Winnicott

British pediatrician and psychoanalyst who developed object relations theory — introducing the concepts of the transitional object (a child's blanket or stuffed animal), the good-enough mother, and the true vs. false self — making him the most practical and humane of the post-Freudian psychoanalysts.

Introduced the true self / false self distinction — the false self develops as a compliance with the environment's demands when the true self (spontaneous gestures, genuine impulses) cannot be safely expressed — making psychological health the capacity to live from one's true self rather than a performed adaptation.