Margaret Sanger
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In 1921 Sanger founded the American Birth Control League, and she served as its president until 1928. The league was one of the parent organizations of the Birth Control Federation of America, which in 1942 became the Planned Parenthood Federation of America, with Sanger as honorary chairman. Sanger, who had traveled to Europe to study the issue of birth control there, also organized the first World Population Conference in Geneva in 1927, and she was the first president of the International Planned Parenthood Federation (founded 1953). Subsequently she took her campaign for birth control to Asian countries, especially India and Japan.
Source
Encyclopedia Britannica
Sanger is known as a crusader for contraceptive rights; but few know that her concern for contraception was based firmly on concern for racial control.
Her early work in impoverished environments led her to the belief that 'genetically inferior' persons should have less children, and that centers for birth control should be 'wisely' placed in neighborhoods which were impoverished, which also frequently happened to be in minority settings.
Her first major 'research' journal, Birth Control Review published articles and research by Eugenicists including a few published by one of Hitler's Eugenicists. Few know of Sanger's concern with racial policies and control, but a careful perusal of authors and articles in these early journals demonstrate her concern with human engineering.
She was later in life appointed honorary head of Planned Parenthood, the group which grew out of her original organization in the 1940s; the journal has continued as a research arm of Planned parenthood till this day, under a different name.
These and other influences of Eugenics proponents in the United States were formidable contributing factors in the lobbying for isolationism and restricted immigration during World War II, hurting mostly Jewish persons wishing to escape the Shoah.
Source
http://www.shoaheducation.com/pNEW.html
Quotes
[We propose to] hire three or four colored ministers, preferably with social-service backgrounds, and with engaging personalities. The most successful educational approach to the Negro is through a religious appeal. And we do not want word to go out that we want to exterminate the Negro population, and the minister is the man who can straighten out that idea if it ever occurs to any of their more rebellious members.
Commenting on the 'Negro Project' in a letter to Dr. Clarence Gamble, December 10, 1939
The eugenists wanted to shift the birth control emphasis from less children for the poor to more children for the rich. We went back of that and sought first to stop the multiplication of the unfit. This appeared the most important and greatest step towards race betterment.
"Margaret Sanger: An Autobiography, W. W. Norton & Co., 1938, pp. 374-375
The third group [of society] are those irresponsible and reckless ones having little regard for the consequences of their acts, or whose religious scruples prevent their exercising control over their numbers. Many of this group are diseased, feeble-minded, and are of the pauper element dependent upon the normal and fit members of society for their support. There is no doubt in the minds of all thinking people that the procreation of this group should be stopped.
Speech quoted in "Birth Control: What It Is, How It Works, What It Will Do." The Proceedings of the First American Birth Control Conference. Held at the Hotel Plaza, New York City, November 11-12, 1921.
Eugenics is … the most adequate and thorough avenue to the solution of racial, political and social problems. "The Eugenic Value of Birth Control Propaganda", October 1921, page 5.
All of our problems are the result of overbreeding among the working class, and if morality is to mean anything at all to us, we must regard all the changes which tend toward the uplift and survival of the human race as moral.
"Morality and Birth Control", February-March, 1918, pp. 11,14.
As an advocate of birth control I wish ... to point out that the unbalance between the birth rate of the 'unfit' and the 'fit,' admittedly the greatest present menace to civilization, can never be rectified by the inauguration of a cradle competition between these two classes. In this matter, the example of the inferior classes, the fertility of the feeble-minded, the mentally defective, the poverty-stricken classes, should not be held up for emulation.... On the contrary, the most urgent problem today is how to limit and discourage the over-fertility of the mentally and physically defective.
"The Eugenic Value of Birth Control Propaganda", October 1921, page 5.