She is considered a groundbreaking figure in the fight for women's reproductive rights.
Here's a bit more about her:
* Activist and writer: She was a passionate advocate for women's access to contraception and safe and legal abortion.
* Founder of Planned Parenthood: Sanger founded the American Birth Control League in 1921, which later evolved into Planned Parenthood, the leading reproductive healthcare provider in the United States.
* Controversial figure: Sanger's views and methods were controversial during her time, and she faced legal challenges and public criticism.
* Legacy: Despite the challenges, her work had a profound impact on changing social attitudes towards birth control and women's reproductive health.
So, while she was involved in various movements, her primary legacy lies in her role as a pioneer of the birth control movement.