It turns out that economic interdependence didn't stop the Germans from marching on France when the Russians declared war on the Austro-Hungarian Empire, and once it started it turns out the economics weren't powerful enough to stop a way in progress.
Economic realities only are in play so long as no one feels they are fighting for their survival as the world geo-political maps continues to change, Russia facing a complete collapse, the coming Chinese demographic problems combined with their food supply issues, etc, many nations will see their only future being through conquest.