First it was a story. Then a moment. Now, two months after women began to come forward in droves to accuse powerful men of sexual harassment and assault, it is a movement. Time magazine has named “the silence breakers” its person of the year for 2017, referring to those women, and the global conversation they have started. The magazine’s editor in chief, Edward Felsenthal, said in an interview on the “Today” show on Wednesday that the #MeToo movement represented the “fastest-moving social change we’ve seen in decades, and it began with individual acts of courage by women and some men too.” Investigations published in October by The New York Times and The New Yorker, both of them detailing multiple allegations of sexual harassment and assault against the movie producer Harvey Weinstein, sparked the sudden rush of women coming forward.