This is actually still a reasonable concern to have. Coincidentally, just yesterday I came across a reference to the book Nuclear War: A Scenario by Annie Jacobsen, speculating on how a global thermonuclear war could start in modern times.

https://en.wikipedia.org/wiki/Nuclear_War:_A_Scenario

The scenario she presents is fictional, but it’s all based on current nuclear arsenals and response protocols. While what I’ve read of it certainly makes it seem like a worst-case scenario in a “nearly everything that can go wrong does” sense, it’s disturbing how relatively few things going wrong it actually takes—in a span of under two hours—to reach “civilizational collapse” level outcomes.

With the expiration of New Start earlier this year, there are no nuclear arms control agreements in effect between the US and Russia, which hasn’t been the case since the 1960s. Russia, China, and the US are all actively modernizing and developing new nuclear capabilities. China has been greatly expanding their nuclear arsenal, building hundreds of new silos. North Korea has an expansive set of tactical and strategic nuclear systems and are in strategic cooperation with Russia. Russia is 4 years into a destabilizing land war, have developed several new weapons systems, and are now in a nuclear weapon sharing agreement with Belarus. And I’m sure I’m missing a bunch of other things.

We are in a period of strategic instability and an arms race that is unlike anything we have seen in the last 50 years. You can quibble with the specifics all you want, but I don’t think anyone can argue that we are at a lesser risk of nuclear war that we were, say, 20 or 30 years ago

No. The past year has substantially nudged things in the other direction.

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