Final answer:
Margaret Sanger and Marie Stopes were crucial in envisioning and advocating for birth control, which paved the way for the development of oral contraceptives. Sanger founded Planned Parenthood and Stopes opened the first birth control clinic in Britain. Their work led to the broader acceptance and eventual approval of the birth control pill in 1960.
Step-by-step explanation:
The concept of oral contraceptives was not envisioned by a single individual, but the development and popularization of the concept of birth control can be attributed to several key figures. Margaret Sanger, a nurse from New York, was one of the earliest advocates for birth control, even though she did not invent the contraceptive methods she discussed. Sanger worked tirelessly to promote the legalization of contraceptive methods and is renowned for founding Planned Parenthood. Her efforts, alongside those of the British family planning pioneer Marie Stopes, played a crucial role in bringing the subject of contraception into public discourse. Marie Stopes, in addition to opening the first birth control clinic in Britain, also published materials like the 'Birth Control News' and the influential book 'Married Love'. These contributions set the groundwork for the acceptance and medical advancement that led to the approval of the birth control pill by the U.S. Food and Drug Administration in 1960. This innovation profoundly impacted women's liberation, allowing them greater freedom to work, pursue education, and control their reproductive lives.