Why game theory could be critical in a nuclear war?

Game theory helps people understand how to make smart choices when others are also trying to be smart.

Imagine you and your friend are both playing a game with explosions, like a big, loud, scary version of tag. You each have a button that can cause an explosion, and if you press it, it might hurt the other person. But if neither of you presses it, no one gets hurt.

In this game, both of you are trying to decide: Should I press my button or not? If you think your friend will press theirs, you might want to press yours too, just in case. But if you both press at the same time, explosions happen for everyone!

This is like what happens in a nuclear war: countries try to decide whether to use nuclear weapons, and they all know that if one country starts it, others might follow. Game theory helps them see how choices can lead to big consequences, just like your button press can lead to loud explosions, or no explosions at all.

So game theory is kind of like a map that shows the best ways to play the game, and in real life, it could help people avoid a really big, scary explosion.