Critical Mass Energy Project
The Critical Mass Energy Project was formed by Ralph Nader in 1974 as a national anti-nuclear umbrella group. It was probably the largest national anti-nuclear group in the United States, with several hundred local affiliates and an estimated 200,000 supporters. Part of Nader's support comes from a Green agenda and the belief that "the most important office in America for anyone to achieve is full-time citizen."  The organization's main efforts were directed at lobbying activities and providing local groups with scientific and other resources to campaign against nuclear power.
The first national anti-nuclear conference, "Critical Mass '74" was held in Washington D.C. under the sponsorship of Ralph Nader. Workshops were held and groups throughout the United States learned about forming anti-nuclear organizations. At about the same time, Karen Silkwood, a nuclear plant worker, was killed in a car accident while investigating her nuclear energy company. There was speculation that the accident may have been intended.
- Wolfgang Rudig (1990). Anti-nuclear Movements: A World Survey of Opposition to Nuclear Energy, Longman, p. 402.
- Mongillo, John F. and Bibi Booth (2001)[https://books.google.com/books/about/Environmental_Activists.html?id=n42Rf_ibaMcC
- Steve Cohn (1997). Too cheap to meter: an economic and philosophical analysis of the nuclear dream SUNY Press, pp. 133-134.
- Steve E. Barkan. Strategic, Tactical and Organizational Dilemmas of the protest Movement Against Nuclear Power Social Problems, Vol. 27, No. 1, October 1979, p. 23.
- Jerome Price (1982). The Anti-nuclear Movement, Twayne Publishers, p. 13.
- Justin Martin (2002). Nader, Perseus Publishing, pp. 172-179.
- Jerome Price (1982). The Anti-nuclear Movement, Twayne Publishers, p. 15.