With facts such as these before us, we cannot doubt that in whatever degree variability may eliminate after awhile peculiar mental or moral tendencies, these are often transmitted for many generations before they die out. If it be unsafe to argue that the responsibility of those inheriting special characteristics is diminished, the duties of others towards them may justly be considered to be modified. Other duties than the mere personal control of tendencies which men may recognise in themselves are also introduced. If a man finds within himself an inherent tendency towards some sin, which yet he utterly detests, insomuch that while the spirit is willing the flesh is weak or perchance utterly powerless, he must recognise in his own life a struggle too painful and too hopeless to be handed down to others. As regards our relations to families in which criminal tendencies have been developed, either through the negligence of those around (as in certain dens in London where for centuries crime has swarmed and multiplied), or by unfortunate alliances, we may 'perceive here a divided duty.' It has been remarked that 'we do not set ourselves to train tigers and wolves into peaceful domestic animals; we seek to extirpate them,' and the question has been asked, 'why should we act otherwise with beings, who, if human in form, are worse than wild beasts?' 'To educate the son of a garotter or a "corner-man" into an average Englishman,' may be 'about as promising a task as to train one of the latter into a Newton or a Milton.' But we must not too quickly despair of a task which may be regarded as a duty inherited from those who in past generations neglected it. There is no hope of the reversion of tiger or wolf to less savage types, for, far back as we can trace their ancestry, we find them savage of nature. With our criminal families the case is not so utterly hopeless. Extirpation being impossible (though easily talked of) without injustice which would be the parent of far greater troubles even than our criminal classes bring upon us, we should consider the elements of hope which the problem unquestionably affords. By making it the manifest interest of our criminal population to scatter, or, failing that, by leaving them no choice in the matter, the poison in their blood may before many generations be eradicated, not by wide-spreading merely, but because of the circumstance that only the better sort among them would have (when scattered) much chance of rearing families as well as of escaping imprisonment. FOOTNOTES: [Footnote 15: It is said by Ribot that of all the features the nose is the one which heredity preserves best.]