The Critical Mass Energy Project was formed by Ralph Nader in 1974 as a national anti-nuclear umbrella group.
[1] 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.
"[2][3] The organization's main efforts were directed at lobbying activities and providing local groups with scientific and other resources to campaign against nuclear power.
[5][6] The second Critical Mass conference was held in November 1975, and this involved a candlelight vigil in front of the White House for Karen Silkwood.