How we turned the tide on domestic violence (Hint: the Polaroid helped)

When Esta Soler lobbied for a bill outlawing domestic violence in 1984, one politician called it the "Take the Fun Out of Marriage Act." "If only I had Twitter then," she mused. In this sweeping, optimistic talk, Soler charts 30 years of tactics and technologies -- from the Polaroid camera to social media -- that led to a 64% drop in domestic violence in the U.S.