Image: Original title page of Walden by Henry David Thoreau. A Different Shade of Green Volume 39, No.1, Summer 2020 (https://perc.org/perc_reports/volume-39-no-1-summer-2020/) When Terry Anderson and Donald Leal published the first edition of their book, Free Market Environmentalism (https://www.perc.org/2001/01/01/free-market-environmentalism-revised-edition/) , in 1991, the idea was met with mixed reviews. “Free market environmentalism is an oxymoron,” wrote one reviewer, “and the authors are the moron part.” https://perc.org/2020/07/06/a-different-shade-of-green/