“Putin’s remarks were a stark reminder that nuclear weapons aren’t just the boogeymen of a bygone age, but remain a key part of the security order that emerged after the end of World War II. By Kristensen’s count, Russia has about 6,000 nuclear weapons and the United States has about 5,500. Either nuclear arsenal is large enough to kill billions of people — but also to serve as a deterrent against attack.
In recent decades, the so-called nuclear order has remained fairly stable. The seven other countries known to have nuclear weapons have much smaller arsenals. Most countries in the world have signed onto the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), which limits the development of nuclear weapons.”
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““I’m more worried than I was a week ago,” Kristensen said. He pointed out that NATO increased its readiness levels for “all contingencies” in response to Putin’s speech, and with increased military buildup comes increased uncertainty. “That’s the fog of war, so to speak,” Kristensen said. “Out of that can come twists and turns that take you down a path that you couldn’t predict a week ago.”
When asked about Putin’s decision to place his nuclear forces on higher alert, Kristensen said, “There is nothing in Russia’s stated public nuclear doctrine that justifies this.” He added, “Putin has now taken yet another step that unnecessarily escalates the situation to what appears to be a direct nuclear threat.””
https://www.vox.com/22951004/nuclear-weapons-russia-ukraine-war-putin