The nature of human beings never changes; it is immutable. The present generation of children and the present generation of young adults from the age of thirteen to eighteen is, therefore, no different from that of their great-great-grandparents. Political fads come and go; theories rise and fall; the scientific 'truth' of today becomes the discarded error of tomorrow. Man's ideas change, but not his inherent nature. That remains. So, if the children are monstrous today – even criminal – it is not because their natures have become polluted, but because they have not been taught better, nor disciplined. – On Growing Up Tough, chapter The Purple Lodge