When home ties are loosened; when men and women cease to regard a worthy family life, with all its duties fully performed, and all its responsibilities lived up to, as the life best worth living; then evil days for the commonwealth are at hand. There are regions in our land, and classes of our population, where the birth rate has sunk below the death rate. Surely it should need no demonstration to show that wilful sterility is, from the standpoint of the nation, from the standpoint of the human race, the one sin for which the penalty is national death, race death; a sin for which there is no atonement; a sin which is the more dreadful exactly in proportion as the men and women guilty thereof are in other respects, in character, and bodily and mental powers, those whom for the sake of the state it would be well to see the fathers and mothers of many healthy children, well brought up in homes made happy by their presence. No man, no woman, can shirk the primary duties of life, whether for love of ease and pleasure, or for any other cause, and retain his or her self-respect.
Theodore Roosevelt, Sixth Annual Message (State of the Union) to Congress (1906)