The movement she started will grow to be, a hundred years from now, the most influential of all time,” predicted futurist and historian H.G. Wells in 1931. “When the history of our civilization is written, it will be a biological history, and Margaret Sanger will be its heroine.” Though this prophecy of nearly 70 years ago credited one woman with the power that actually came from a wide and deep movement of women, no one person deserves it more. Now that reproductive freedom is becoming accepted and conservative groups are fighting to maintain control over women’s bodies as the means of reproduction, Sanger’s revolution may be even more controversial than during her 50-year career of national and international battles. Her experience can teach us many lessons. She taught us, first, to look at the world as if women mattered. Born into an Irish working-class family, Margaret witnessed her mother’s slow death, worn out after 18 pregnancies and 11 live births. While working as a practical nurse and midwife in the poorest neighborhoods of New York City in the years before World War I, she saw women deprived of their health, sexuality and ability to care for children already born. Contraceptive information was so suppressed by clergy-influenced, physician-accepted laws that it was a criminal offense to send it through the mail. Yet the educated had access to such information and could use subterfuge to buy “French” products, which were really condoms and other barrier methods, and “feminine hygiene” products, which were really spermicides. It was this injustice that inspired Sanger to defy church and state. In a series of articles called “What Every Girl Should Know,” then in her own newspaper The Woman Rebel and finally through neighborhood clinics that dispensed woman-controlled forms of birth control , Sanger put information and power into the hands of women. While in Europe for a year to avoid severe criminal penalties, partly due to her political radicalism, partly for violating postal obscenity laws, she learned more about contraception, the politics of sexuality and the commonality of women’s experience. Her case was dismissed after her return to the States. Sanger continued to push legal and social boundaries by initiating sex counseling, founding the American Birth Control League and organizing the first international population conference. Eventually her work would extend as far as Japan and India, where organizations she helped start still flourish. Sanger was past 80 when she saw the first marketing of a contraceptive pill, which she had helped develop. But legal change was slow. It took until 1965, a year before her death, for the Supreme Court to strike down a Connecticut law that prohibited the use of contraception, even by married couples. Extended to unmarried couples only in 1972, this constitutionally guaranteed right to privacy would become as important to women’s equality as the vote. In 1973 the right to privacy was extended to the abortion decision of a woman and her physician, thus making abortion a safe and legal alternative–unlike the $5 illegal butcheries of Sanger’s day.