So I just listened to this lecture from Eric, Cline who talks about how simultanious stressors can stack up, and, how international trade can become a vulnerability for a nation. This is not a lecture about modern economies, but ancient/classical cultures, and for that reason might provide an interesting listen. https://youtu.be/bRcu-ysocX4 I think it underscores a lot of the possibilities for a stability mechanic.