I doubt that the United States will be so reckless as to unleash a third world war. Moreover, this war is not profitable for anyone. And the main question is who will fight with whom?
Iran wants to be a normal country and live a normal life, so they agreed to a nuclear deal, and as a result receive additional sanctions from the United States, which in turn prohibit European countries from dealing with Iran. Glaring injustice.
How can war not be profitable ? You contradict capitalism. It doesn't matter who's with whom, it matters who will be the primary beneficiary
Very easily.
Look at what happened to Germany after The Great War.
To whole Europe to be exact.
People thought there was never going to be another war of that proportion again because of the enormouse damages that everyone suffered.
It was impossible for the defeated to pay enough reparations to the victors in order to cover their damages.
Most wars will end without any profit whatsoever especially in modern times when you can't just seize resources and exploit populations to cover the costs.