The building no longer exists. No plaque marks the site. But from Sanger's activism, the movement that today is represented by Planned Parenthood emerged. And as everyone (and especially women) know, a century later the fight for free reproductive choice that Margaret Sanger launched still grinds on.
Jonathan Eig, author of biographies of Jackie Robinson, Al Capone and Lou Gehrig, turns his attention to the story of the birth-control pill in his latest book, The Birth of the Pill. Eig came on The Interview Show to talk the science, politics and sociology behind what he calls the most important invention of the 20th century.