I think they still would have, fossils fuels are the perfect commodity to make money off of and I don't think capitalists would have let that go without a fight. By their very nature using fossil fuels for power destroys them, requiring a constant source, and demand has only increased over time. If solar had been gaining ground in a serious way I feel like the oil cartels of the day would have had something to say. Who knows, maybe they were involved in the kidnapping