Ultimately I think we will avoid World War III because the corporations don’t want it;
..today, it should have ended with.
Tomorrow, as they say, is a whole new ball game and it's certainly hard to predict what our sociopathic corporate masters will want for us then.
I agree with your premise, however. Killing your customers is usually considered "bad business" and is to be avoided most times.
However, given certain political and economic conditions, I do believe corporations could easily be convinced to give the go ahead to War.