Without Birth Control

Without birth control, we could not dispense with the old checks on the increase of population – war, pestilence, and famine. This has been obvious since the time of Malthus. Every opponent of birth control, unless he is incapable of arithmetic, must be assumed to be supporters of war… Thus the practice of birth control should be regarded, not merely as permissible, but as a public duty; and every citizen should be helped to perform this duty. - Marriage and Morals