title: The Russo-Ukrainian War and the Durability of Deterrence
abstract: Both the Russian Federation and the United States and its allies have avoided taking actions carrying the greatest risk of escalation to nuclear-weapons use. Left uncertain is whether specific contingencies might yet prompt nuclear use. But the Russo-Ukrainian war has now been going on long enough to ground the debate in what has been said and done during its course. Russian nuclear decision-making requires the most attention, and Russian President Vladimir Putin's statements about it have been 
journal: Survival