If human evolution is to continue along the same lines as in the past, it will probably involve a still greater prolongation of childhood and retardation of maturity. Some of the characters distinguishing adult man will be lost. It was not an embryologist or palaeontologist who said, "Except ye... become as little children, ye shall not enter into the kingdom of heaven."

Ch. V What is Fitness? - The Causes of Evolution (1932)