At times, it has been derisively referred to as “slacktivism,” the idea being that it requires no effort on the part of would-be activists to show their support. You no longer have to sacrifice in order to feel like you’re helping the cause. All anyone had to do was change their social media profile picture to them wearing a hoodie, or put #Justice4Trayvon in a status update, and suddenly they were the movement. Our grandparents risked life and limb in the streets, were beaten by police officers and other defenders of white supremacy. We just clicked “like” on Facebook.