Perhaps It Was A Little Unkind Of Putin.

https://news.sky.com/story/russia-vladimir-putin-orders-military-command-to-put-nuclear-deterrence-forces-on-high-alert-12553278

A rational actor. A key concept within nuclear strategy.

Is someone who would not undertake a course of action. Knowing that it would seem the destroyed or do themselves serious harm.

You can't apply it to the delusional.

https://twitterwithbraincells.blogspot.com/2022/02/clearly-nato-are-not-rational-actors.html

The key element is that they have enough of a grasp on reality.

That they're able to understand the consquences of the actions.