Suppose an anthropoid were taken into a typical human family at the day of birth and reared as a child. Suppose he were fed upon a bottle, clothed, washed, bathed, fondled, and given a characteristically human environment; that he were spoken to like the human infant from the moment of parturition; that he had an adopted human mother and an adopted human father . . . . The experimental situation par excellence should indeed be attained if this technique were refined one step farther by adopting such a baby ape into a human family with one child of approximately the ape’s age.