In the old Soviet Union, the Communists allegedly used the term "useful idiot"1 to describe Westerners whose naïve political views furthered the Soviet agenda, even though these Westerners didn't realize that they were being exploited in such fashion. It is in this context that I confidently declare that American economists have been useful idiots for the green socialists pushing extreme climate change policies. The radical environmentalists were quite happy to embrace the economic concepts of "Pigovian negative externalities" and a carbon tax in the past, but now that it is impossible for economic science to endorse their desired agenda, the activists have discarded the entire field as hopelessly out of touch. Economists who still support a carbon tax and other climate "mitigation policies" should be aware of the bigger picture.
