There would be an immense toll, but it would mean the destruction of the US, Israel, NATO, and neoliberalism generally, which I think means there is also room for optimism. If I may gesture towards Mark Twain, there are two Reigns of Terror here, and though we have reason to fear the latter one, it will not last as long or kill as many as the former one that it puts an end to. If there is not a nuclear holocaust, anyway