Building on your point about WWII being economy Vs economy and the economic underpinnings of the war in the Pacific, I have a memory of reading a similarly economics-centric analysis of the start of the war in Europe. I do not have a link but from memory Germany had insufficient farmland relative to its population and little access to important resources, especially oil. This set them up to be dependent on their neighbors indefinitely, neighbors who could turn off the food/oil tap at any time. That was not an appealing idea to the Nazis.
Not sure how well accepted that theory is or isn't but it certainly seems to hold a lot more credence than "the war in Europe started because Hitler."