Dian Fossey – primatologist known for studying gorillas, author, founder of the Digit Fund today known as the Dian Fossey Gorilla Fund International, was murdered presumably by poachers because of her cause
Lyndon Baines Johnson – signed the Wilderness Act on September 3, 1964, which permanently guaranteed millions of acres of wild land for future generations of Americans
Stephen Mather – conservationist who was the first director of National Park Service, as a unified federal agency to oversee National Parks administration which he ran publicity campaign to established
Ric O'Barry – former dolphin trainer for the TV show Flipper turned dolphin activist and conservationist, featured in the documentary The Cove
Ernest Oberholtzer – one of the eight founders of The Wilderness Society
Sigurd F. Olson – author, environmentalist, teacher, canoeist and advocate in the northern Midwest. Worked to establish Pt. Reyes, Arctic NWR, Boundary Waters Canoe Wilderness
Deborah Parker – indigenous rights activist, conservationist, and environmentalist who has opposed various pipeline projects[2][3] and who advocates for protecting coastal waters and salmon among the Northwest Natives
Phil Radford – environmental, clean energy, and democracy leader, director of Greenpeace
Bradbury Robinson – medical doctor and conservationist who published warnings in the 1940s against the use of DDT in agricultural
Theodore Roosevelt – set aside 194,000,000 acres (790,000 km2) of federal land for national parks and nature preserves. He was also instrumental in establishing the United States Forest Service
Doug Tompkins and Kristine Tompkins – entrepreneurs turned conservationists; together have protected 2,200,000 acres (8,900 km2) in Chile and Argentina
David B. Wingate – saved the Bermuda petrel, or cahow, from extinction and almost single-handedly returned 15-acre Nonsuch Island, in Bermuda, to its precolonial state
E.O. Wilson – Pelligrino University Professor at Harvard University, for introducing the concept of Biophilia and making many other contributions to environmental science[4]
^Winters, Chris (September 16, 2016). "Tulalips support Standing Rock Sioux protesting oil pipeline". Local News. The Daily Herald. Tulalip: Josh O'Connor. ISSN2332-0079. Archived from the original on June 3, 2018. Retrieved June 3, 2018. On Friday, about 100 Tulalip members took part in a rally and march in downtown Seattle, said Deborah Parker, a former Tulalip board member who went down with her family.
^Biophiliaby E.O. Wilson, Harvard University Press, 1984