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Conservation Roots
1854
Henry David Thoreau
wrote Walden
1856
Frederick Law Olmstead
designed
New York City's Central Park
1864
George Perkins Marsh
wrote Man
and Nature
1882
J. Sterling Morton
started Arbor Day
1897
John Muir
founded the Sierra
Club
1905
Gifford Pinchot
1st
Chief of the U.S. Forest Service
1929
Rosalie Edge
founded the
Emergency Conservation Committee
1930
Robert Marshall
founded the
Wilderness Society
1934
Jay (Ding) Darling
political cartoonist
1949
Aldo Leopold
wrote Sand County
Almanac
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Environmental Branches
1962
Rachel Carson
wrote Silent Spring
1968
Paul Ehrlich
wrote The Population
Bomb
1969
David Brower
founded Friends of
the Earth
1970
Barry Commoner
biologist who
reported the death of Lake Erie
1970
Gaylord Nelson
started Earth Day
1971
Marjorie Stoneham Douglas
founded
Friends of the Everglades
1972
William O. Douglas
Sup. Court
Justice argued that trees have legal standing
1972
Garrett Hardin
wrote The Tragedy of the
Commons
1987
Edward Abbey
wrote The Monkey
Wrench Gang
1992
E.O. Wilson
wrote The Diversity
of Life
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