In 1975, the term "sexual harassment" was first used in public — giving women a word for what was happening in the workplace — and the potential for change. Government institutions and corporations formally banned it. Lawyers helped settle cases. Harvey Weinstein declared himself a "feminist." But changing the rules did not change the power dynamics. Now, revelations about Weinstein and others have made that reality undeniable. In 24 hours, millions of women around the world posted, "Me Too." Is it finally time for men to join the struggle for change?