Woman and the New Race is a book by birth control advocate Margaret Sanger published in 1920. It advocates contraception as the only reasonable means to prevent overpopulation. The book discusses Dr. Thomas Robert Malthus's advocacy of celibacy until middle age to avoid
overpopulation, but criticizes the idea as harmful,
Margaret Higgins Sanger (1879-1966) was an American birth control activist, sex educator, and nurse. Sanger popularized the term birth control, opened the first birth control clinic in the United States, and established organizations that evolved into the Planned Parenthood Federation of America. Sanger's efforts contributed to several judicial cases that helped legalize contraception in the United States. Sanger is a frequent target of criticism by opponents of birth control and has also been criticized for supporting eugenics, but remains an iconic figure in the American reproductive rights movement.
http://en.wikipedia.org/wiki/Margaret_Sanger
See her papers at:
http://asteria.fivecolleges.edu/findaids/sophiasmith/mnsss43_main.html