On this day in 1892, John Muir founded the famous environmental organisation the Sierra Club in San Francisco, California. Muir was a notable conservationist and preservationist and became the Club’s first president. The Sierra Club worked to establish and protect federal national parks, most famously Yosemite National Park. Their cause received a boost during Progressive Theodore Roosevelt’s presidency (1901-1909), who was a naturalist like Muir. Some of the Club’s most notable successes since 1892 came during Lyndon Johnson’s Great Society programme, including the Clean Air Act, the Clean Water Act and the Endangered Species Act. The Sierra Club continues to be an influential group in the United States as one of the largest pressure groups in the nation. It has a significant influence over environmental issues and dedicates itself to tackling climate change and damage to the environment, most recently protesting against the construction of the Keystone XL pipeline.