Solar energy is not practically limited, is already cheaper than oil, and can be harvested directly on earth You're making a key mistake here. You're using ter

Solar energy is not practically limited, is already cheaper than oil, and can be harvested directly on earth You're making a key mistake here. You're using terrestrial standards to judge something which can grow exponentially to many times what's possible to do on Earth. If the planners of major powers recognize this exponential expansion in an early phase, wars can be fought over who gets to plant the seeds and harvest the result. The military power embodied in the kind of energy harvesting we're talking about here, greatly dwarfs the same possible on Earth. If the great powers realize this, they will fight over it, with more ferocity than they do over access to the oceans.