We can be thankful he lived to see the Cheney family being evicted from the Republican party in humiliating style; in no small part because of how ruinous his policies were for the right wing's strategic position. An unfortunate trend in history is a lot of these sort of people never have to confront how disastrous their legacy was. If there was an expectation that they have to see consequences of their failures in their own lifetime maybe that'd spur some standards that more ephemeral concepts of legacy do not.