The Sierra Club's Unlikely Roots in Ecological Activism The Sierra Club, one of America's most prominent environmental organizations, has been at the forefront of ecological activism for nearly a century.
Its history is often attributed to John Muir, but another key figure, Phoebe Hearst, played a crucial role in founding the club.
Phoebe Hearst was a philanthropist with her own unique perspective on human nature relationships. As the wife of George Hearst, a California gold miner and senator, she had access to influential circles.