Before meeting Dave Foreman at his home in Albuquerque, New Mexico, I spent three days backpacking in the Pecos Wilderness Area, a two-hundred-thousand-acre tract granted the highest level of federal protection. Along the way I experienced frost, sunburn, hail, rain, dehydration, and swollen streams — and I loved every minute of it. Clearly, like many other Americans, I have what Foreman calls the “wilderness gene.”

It’s thanks to the work of conservationists like Foreman, whom Audubon magazine named one of the hundred Champions of Conservation of the Twentieth Century, that places like the Pecos received protection through the 1964 Wilderness Act. Foreman served for many years as Southwest regional representative of the Wilderness Society, which received widespread bipartisan support, as had the conservation movement as a whole since its founding a century before. Then, in the 1980s, President Ronald Reagan appointed as secretary of the interior the notorious antienvironmentalist James G. Watt, who once remarked that our responsibility to the land is to “occupy” it until Jesus returns. After that, Republicans began to dismiss concerns about the environment as impediments to economic growth.