Martin Luther King, Jr. said with characteristic simplicity and clarity: It may be true that the law cannot change the heart but it can restrain the heartless. It may be true that the law cannot make a man love me but it can keep him from lynching me and I think that is pretty important.12 In fact, enforcement of the law can powerfully accelerate the transformation of cultural attitudes by bringing to bear public sanction—as Americans have seen in segregation, domestic violence, drunk driving and smoking.