Wow! What’s the model based off?

https://primal.net/e/note14fegxy82p853qpkrd6hj4y474yunx7dsxhr27j3jxvnyk3lsxsaqvwp2c5

Isnt there a theory, that if a nation is X % too much in depth compared to GDP, that this very often ends up in a war? What percentage was that once again? :S