After World War II, the British psychiatrist and psychoanalyst John Bowlby (1907-1990) studied child development by observing orphans. He noticed a phenomenon that all the theories of child development at the time could not explain. Namely, even children who were given adequate medical care, nourishing food and shelter were not thriving. Some even died. 

In trying to explain why some children flourished while others given virtually the same circumstances perished, Bowlby eventually developed his groundbreaking theory of attachment. Based on ideas from evolutionary biology, ethology and social psychology, attachment theory proposes that because human beings are born helpless, they are “programmed” to search for and to attach to a caregiver or multiple caregivers, for survival.

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