Barry Commoner (1917-2012) was an influential American biologist, environmentalist, and educator known for his pioneering work in raising awareness about environmental issues. Commoner emerged as a prominent figure in the environmental movement during the 1960s and 1970s, advocating for stronger policies to combat pollution and promote sustainability. His seminal work, "The Closing Circle," published in 1971, critiqued the impact of technological advancements on the natural environment and underscored the interconnectedness of ecological systems. Commoner also ran for president in 1980 as the candidate of the Citizens Party, bringing environmental concerns to a national political platform.