Suppose that the paper is correct. We could even go farther than it does by assuming twice as much time before warming becomes 'dangerous' and that it is (or be

Suppose that the paper is correct. We could even go farther than it does by assuming twice as much time before warming becomes 'dangerous' and that it is (or becomes) sufficiently a commonly held knowledge or belief. Is it dangerous in the short term? Yes. States and state-like actors will begin preparing for the projected shifts in climate, water availability, etc. They will shift alliances, exert influence in new places, perhaps abandon old allies. Even countries that are projected to be spared will need to take steps if they have neighbors who will not be. And they will start as soon as possible. When states all shuffle the cards, it is always dangerous.