David Brower is widely regarded as the father of the modern environmentalism movement. He served two decades as executive director of the Sierra Club and fought fiercely to defend wilderness and rivers in the American West. Supporters admired his passion, vision, and unyielding efforts, while his opponents found him polarizing and reckless. In his book, the journalist Robert Wyss explores Brower’s complicated personal life and his fearless stewardship of the environmental movement. (Rebroadcast)