When does a moment become a movement? Events such as the killing of unarmed, 18-year-old Michael Brown in Ferguson, Mo., can provide the moral shock that political movements need to build their ranks and bring attention to a communitys afflictions. They can be like the murder of 14-year-old Emmett Till in 1955 or the beating death of Matthew Shepard in 1998 transformative episodes that remake perceptions and force a society to abandon abhorrent practices.