Not sure I agree. Many countries were already on the path to using more and more oil. And many countries simply don't have coal resources, see Switzerland need

Not sure I agree. Many countries were already on the path to using more and more oil. And many countries simply don't have coal resources, see Switzerland needing coal imports from Nazi Germany. So in energy terms I think the use of oil naturally leads to globalization as people had few other options. Coal is more widely distributed and would likely have seen some more use, but oil and gas were gone increase in use WW2 or not.