Huffington Post: As the markets have gone down, long-held assumptions have been thrown up into the air. Economic theories, and not just the value of our homes and our retirement accounts, are coming undone. In some cases, that may just be a good thing. Consider the argument that climate change solutions, no matter what you may think about the science, are simply too costly. This has long been a stock argument of the political right. Indeed, it was one of the publicly stated reasons President George W. …