652. 20 The Human Body tally and morally - much more closely than we do our fathers and mothers. And back beyond this grandparent heritage lies a vast inheritance, developed from the traits, habits and appearances of progenitors, extending back for scores of generations - any one of which characteristics is likely to crop up at any time. So that in the most staid and respectable families, a child may sometimes be born who may have all the immoral or utterly cruel characteristics or any one of his remote ancestors - who may have been a robber, a murderer, a pervert, or even a degenerate. This applies of course to girls, as well as to boys. So that the question, asked hundreds of thousands of times, in hundreds of thousands of families - "How did this child acquire such a bad temper and disposition?" - is answered by the fact that he or she got it directly by what is known as a "throw-back" from some ancestor, dead, perhaps, for hundreds of years. From all this it will be seen that the physical body, while important, actually is no more important than the mind - or the hidden impulses that actuate it in its functioning, in its conduct, and in its relation to its fellows throughout life. It behooves us, therefore, not only to perfect a "sound mind in a sound body," but also to develop our psychic forces and our moral fibre, so that we may live decently and with credit to the great Force that put us on this planet, for the purpose of working out our further development. Eugenics Eugenics is that science which concerns itself mainly with the improvement of the human race. In a certain sense, the principles that underlie this science are followed by every right-minded man and woman. The science of Eugenics lies in heredity and its adaptation to the best possible development of the progeny. Unless one understands the principles of heredity, he cannot possibly understand human life and its manifestations. He cannot form any adequate conception as to his own natural endowments or their derivation, nor can he conceive of