Of course it does. History bears witness, both the history we know and the history we suspect.
The real question is, does radical climate change plus about fifty other related factors that "just happen" to coincide lead to war and worse than war? Apocalyptic war?
Of course it does.
Remember, if you were reading Vault-Co ten years ago you had a one decade advance notice on these things long before the "intelligence" communities were able to draw these simple conclusions. Tex only makes it look easy in retrospect. It's sort of like the first time somebody broke 4 minutes in the mile. Initially it was considered a miracle but a short while later it was fairly routine.