John Bowlby
Edward John Mostyn Bowlby, CBE, FBA, FRCP, FRCPsych (; 26 February 1907 – 2 September 1990) was a British psychiatrist, and psychoanalyst, notable for his interest in child development and for his pioneering work in attachment theory. A ''Review of General Psychology'' survey, published in 2002, ranked Bowlby as the 49th most cited psychologist of the 20th century.
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