In our study of psychopathology, we began as sadists trying to produce abnormality. Today, we are psychiatrists trying to achieve normality and equanimity.

Harry Harlow

Psychologists

Harry Harlow

U.S. psychologist (1905-81). His 1958 surrogate-mother work showed infant monkeys prefer contact comfort to feeding, grounding Bowlby's attachment theory. Later isolation studies helped spark U.S. animal liberation.

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