It seems to me that the United States is more likely to be the aggressor given its record of interventionism, not to mention Hiroshima and Nagasaki. The Russians and the Chinese are far more peaceful - they do not position military bases aggressively around the world, do not fund proxy armies, and do not fund countries like Saudi Arabia that are responsible for the ongoing Yemeni famine (I've refrained from touching the more contentious topics in US foreign policy). The idea that the United States is under threat, rather than the threat, is laughable.

If any country is well positioned to de-escalate a nuclear arms race, it is the United States, and this is the action that it should take.