The nature of love.

Much as been written about Harry Harlow’s controversial use of rhesus macaques as experimental subjects in his research on mother-infant bonds. On August 31, 1958, Harlow presented the results of his work in his presidential address at the Sixty-sixth Annual Convention of the American Psychological Association in Washington, D. C. This talk was later published as a paper in the American Psychologist. This chapter is an excerpt from that paper and presents a fascinating perspective into Harlow’s views on human-macaque relations, animal sentience and ‘the nature of love’.