“That which parents should take care of… is to distinguish between the wants of fancy, and those of nature.”

Source: Pride and Prejudice

Psychoanalysis and the Unconscious (1921)

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

The Law of Nations (1758)
Original: (fr) Les naturels, ou indigenes, sont ceux qui sont nes dans le pays, de parens citoyens.

http://www.fool.com/news/commentary/2006/commentary06012002.htm

Section II, Chap. II.
The Theory of Moral Sentiments (1759), Part II

Source: Survivals and New Arrivals (1929), Ch. V New Arrivals

1960s, Family Planning - A Special and Urgent Concern (1966)
Context: The Negro constitutes half the poor of the nation. Like all poor, Negro and white, they have many unwanted children. This is a cruel evil they urgently need to control. There is scarcely anything more tragic in human life than a child who is not wanted. That which should be a blessing becomes a curse for parent and child. There is nothing inherent in the Negro mentality which creates this condition. Their poverty causes it. When Negroes have been able to ascend economically, statistics reveal they plan their families with even greater care than whites. Negroes of higher economic and educational status actually have fewer children than white families in the same circumstances.

Source: A Treatise On Political Economy (Fourth Edition) (1832), Introduction, p. xvii