Don't you see that this is happening now anyway? It is just happening slowly, because it is a slow rape of the global resources. However, it will get to the point that nothing can be done. Disruption now gives a chance for actual changes to take place, rather than continual cuts until we all bleed out.
Russia is not an issue, other than them having nukes. China is. Middle East is always on the brink of war - if they want to be leaders of anything, they have to get over themselves.
Global trade would explode.