Nuclear Issues

The initial stage of the war in Ukraine has confounded expectations. Russia’s military invasion failed in key objectives, upending predictions of a rout of Ukraine. Then, after years of avoiding direct confrontations with Moscow, Western nations are now directly punishing Russian President Vladimir Putin and his allies with truly devastating economic sanctions while openly supplying arms to Ukraine.

Though there were peace talks for the first time on Monday, there are no signs that the cycle of escalation will go down. Amid unprecedented global pressure, Putin is doubling down on a defensive posture that pits Russia against almost everyone else in the world. He has ratcheted up the levels of violence in eastern Ukraine, bombarding the city of Kharkiv with suspected cluster munitions, while putting the country’s nuclear arsenal on alert.

Nuclear experts are trained to think the unthinkable. So, here is an unthinkable scenario that might actually happen in real life:

The battle over Ukraine drags on. From both the European Union and the United States, fresh weapons and other supplies continue to enter into Ukraine and allow the Ukrainian forces to fight on. The battle reaches what conflict resolution expert William Zartman calls “a hurting stalemate” situation. The balance of forces on the ground is not completely or perfectly symmetrical, but what was once considered a completely disproportioned asymmetry of forces has been gradually re-equilibrated, in favor of the Ukrainian forces.

In light of Russia’s annexation of Crimea and its current threat to Ukrainian sovereignty, it’s fair to ask: What is the significance now of the Budapest Memorandum?

Whenever Washington or Moscow unveils a new weapon, ears in the other capital perk up and analysts try to divine how the new system fits into U.S. or Russian military strategy—not least of all, strategy toward its Cold War-era nemesis. But how often do decisions related to national security arise because of institutional forces only tenuously related to states’ strategic planning? More specifically, how do the countries’ respective defense industries influence policy? The Belfer Center’s Russia Matters project asked two scholars—one American, one Russian—to investigate the latter question. Their articles, published in November, reveal fascinating differences (and similarities) in the way this influence is exercised in countries with vastly different political and economic systems.

The Biden-Putin summit in Geneva did not disappoint the very low expectations set out for it. To move beyond symbolism and signaling, however, the Biden-Putin proclamation has to be translated into practical progress.

No great breakthroughs or dramatic developments were expected at the Biden-Putin summit, and none was achieved. But the message was clear: There is a new sheriff in town. Putin noticed, describing Biden as very different from Trump—experienced, balanced, and professional.

In the authors' view, neither formal NATO membership nor nuclear weapons are fitting security options for Ukraine in the face of Russian aggression. To secure its borders and achieve sustainable peace and stability in Europe, Ukraine should forge a treaty-based strategic alliance directly with the United States.

A comparative analysis of the United States’ and the Soviet Union’s previously underexplored radiological weapons programs identifies the drivers behind their rise and demise. The findings of this analysis illuminate the factors likely to affect the pursuit of radiological weapons by other states in the future.

Carpenter and Montgomery replicate a key question from Sagan and Valentino’s landmark survey of U.S. attitudes toward the laws of war and introduce variations into Sagan and Valentino’s experiment. The findings reveal Americans’ strong belief that targeting civilians is wrong, and that a majority would likely oppose such action in real life.

On August 6, 1945, the United States dropped an atomic bomb on Hiroshima, Japan, launching the nuclear age. On the 75th anniversary of that somber event, Belfer Center experts reflect on the event and its aftermath.