Does anyone remember the Cheney energy task force? Early in the George W. Bush administration, Vice President Dick Cheney released a report that was widely derided as a document written by and for Big Energy — because it was. The administration fought tooth and nail to keep the process by which the report was produced secret, but the list of people the task force met was eventually leaked, and it was exactly what you’d expect: a who’s who of energy industry executives, with environmental groups getting a chance to make their case only after the work was essentially done.

But here’s the thing: by the standards of today’s Republican Party, the Cheney report was enlightened, even left-leaning. One whole chapter was devoted to conservation, another to renewable energy. By contrast, recent speeches by Jeb Bush and Marco Rubio — still the most likely Republican presidential nominees — barely address either topic. When it comes to energy policy, the G.O.P. has become fossilized. That is, it’s fossil fuels, and only fossil fuels, all the way.

And that’s a remarkable development, because while it’s true that fracking has led to a boom in U.S. gas and oil production, we’re also living in an era of spectacular progress in wind and solar energy. Why has the right become so hostile to technologies that look more and more like the wave of the future?

Before I try to answer that question, a few facts about renewable energy.

Wind and solar used to have a reputation as hippie-dippy stuff, not part of any serious approach to our energy future, and many people still have that perception. But it’s way out of date. The cost of wind power has dropped sharply – 30 percent in just the past five years, according to the International Energy Agency.