The U.S. relies so heavily on oil that if it disappeared then they would probably be dragged down unless they found a better solution.
The U.S needs oil because, it runs cars, and also many other things. It runs boats for trade, airplanes, runs electricity creation plants, and it also creates our roads.
To regulate commerce with foreign nations,and among the several states, and with Indian Tribes
the south had slavery and the north had ended slavery.