There's an old EconTalk podcast (I listen to EconTalk, yes) about why nations fail and the argument presented in the episode is that leaders know what good policies are but they choose not to implement them for other reasons. Without offering an opinion on that thesis, it's hard not to see merit in it when you read "Of course, some liberals don't want to have a discussion about the underlying problem, because it would mean acknowledging the fallen nature of man. That, not stricter gun laws, is what's keeping us from finding real solutions as a nation."