As we have moved down the ages, now and then, from the religious teacher, the statesman, the inventor, the social worker, or from the doctor, surgeon, or sexologist, there has been a "vox clamantis in deserto." Usually these voices have fallen on unheeding ears; but again and again some delver in books, some student of men, some inspired, self- effacing, or altruistic one has taken up the cry; …