I think the central idea of ??the Gundam 00 cartoon should be around the proposition that war finally stops war. The first season:

It is about the world’s progress due to human progress. And become war-prone, used by heaven and man, and use self-sacrifice to make the world peaceful (it is to rely on GUNDAM, a world-leading technology, to unite the divided world with it, defeat yourself, and make the world peaceful)

Season 2:

It is said that Li Fonz's "rebellion" has plunged mankind into another war, and the gods will try to stop it

I I believe that there are actually two ways to prevent war in Gundam 00. One is to use war to prevent war like Setsuna, and the other is to use "trust in humans" to prevent war like the princess did.

Anyway, Gundam 00 is quite good-looking and worth watching