Or maybe it has. This is one of the inherently difficult issues with the gun control argument--we can see when laws don't work to prevent shootings, but we don't have any visibility into when they DO work. Who knows. As bad as the violence is in Chicago, maybe it would be worse if there weren't the restrictive laws there are. Maybe background check laws have stopped would-be shooters. Maybe the 1994 assault weapons ban has saved thousands of lives.for those who think more laws and gun bans will curb violence , look to Chicago. certainly hasn't done any good there
No law is going to stop all instances of a crime. The question is balancing the restrictiveness of the law against the benefit gained.