With each advance that it makes society embodies in its institution the principles of social life such as it has been able to discover them. These principles being finally accepted, we must assume that they are eternal or else we are compelled to admit that society may be for ever at fault, that its development does not correspond with the true development of man, and that this present life is in no wise preparatory for a future. Though we declare that the principles of society are eternal, the social institutions which embody them are merely temporal, and may change with time and circumstances. They are, nevertheless, binding upon our allegiance, and any attempt to overthrow them becomes the anti-social act of the criminal and is a punishable offence. The criminal is an enemy to social advance. He profanes that which society holds sacred, he scatters that which society, at great cost has acquired, and he attacks society at its most vulnerable points. What, then it may be asked, are the causes that produce this anti-social being? In the case of the sane criminal, an immoral basis underlies all causes, and without this they would each and all be impotent. Some causes, as e.g. alcoholism, are the result of the individual's immorality; others again are independent. The principal causes are:--A bad ancestry (heredity), bad domestic and social conditions, alcoholism, imitation, and stress of circumstances. =Heredity.=--Among unscientific people there are many extravagant theories held, some even affirming that from the moment of conception a child's character may be determined as criminal, as if character underlay habit instead of habit evolving character.