A Constitution is not intended to embody a particular economic theory . . . It is made for people of fundamentally differing views, and the accident … - Oliver Wendell Holmes

The first requirement of a sound body of law is, that it should correspond with the actual feelings and demands of the community, whether right or wrong.

Law, being a practical thing, must found itself on actual forces. It is quite enough, therefore, for the law, that man, by an instinct which he shares with the domestic dog, and of which the seal gives a most striking example, will not allow himself to be dispossessed, either by force or fraud, of what he olds, without trying to get it back again. Philosophy may find a hundred reasons to justify the instinct, but it would be totally immaterial if it should condemn it and bid us surrender without a murmur.

We have seen more than once that the public welfare may call upon the best citizens for their lives. It would be strange if it could not call upon those who already sap the strength of the State for these lesser sacrifices, often not felt to be such by those concerned, in order to prevent our being swamped with incompetence. It is better for all the world, if instead of waiting to execute degenerate offspring for crime, or to let them starve for their imbecility, society can prevent those who are manifestly unfit from continuing their kind....Three generations of imbeciles are enough.