This pill came with a promise: help extinguish sexism from public life by removing a key roadblock for women. If women could plan when and whether they became pregnant, they should be better able to develop careers and livelihoods, avoid a life of economic dependence on men, and form identities outside of motherhood.

In many ways, the birth control pill kept that promise by enabling women to enter the workforce, improving their health by helping them to space out pregnancies, and allowing them to have sex for pleasure. But more than 50 years after the pill first came to market, its promise of access and equality remains unfulfilled for millions of other women.

Think about the Hobby Lobby decision, which ruled that certain businesses can deny employees coverage for contraception on the basis of religious beliefs. The fact that many insurance plans still don’t cover contraception or infertility treatments. “Time passes and yet we’re still kind of stuck when it comes to reproductive rights,” said New York Times Health reporter Catherine Saint Louis at a recent New America NYC event. Cost and culture still prevent millions of low-income women here and abroad from obtaining the pill.

“The things we’re talking about [today] are the same things [Margaret Sanger, one of the pill’s bankrollers and the founder of Planned Parenthood] was talking about in 1914,” said Jonathan Eig, the author of the book, “The Birth of the Pill.” “I honestly believe she thought once the pill got out there, the genie would be out of the bottle, women would have all the power they needed and everything would be fine after that…I really think she’d be stunned.” ...