This quick TED talk entry is courtesy of TED.com. 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. This sweeping, optimistic talk 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.