Environmentalists through History By StubbyCRM Jan 1, 1864 George Perkins Marsh Began doing research in and writing books on his observations of man's interaction with nature. Jan 1, 1892 John Muir In 1892 John Muir establishes the Sierra Club to promote conservation, preservation, and appreciation for nature. Jan 1, 1901 Theodore Roosevelt Began massive natural preservation and conservation legislation. Also, he very actively promoted the preservation of nature. Jan 1, 1924 Aldo Leopold One of he earliest to study wildlife management. Also, he was one of the first to attempt environmental recovery techniques. Jan 1, 1962 Rachel Carson Carson writes and publishes the book Silent Spring to expose and predict the highly offensive effects of DDT use in America. Jan 1, 1967 Paul and Anne Ehrlich Known for creating many theories about overpopulation and human impact on the environment via population, affulence, and technology. Jan 1, 1970 E.O. Wilson E.O. Wilson becomes highly active in global conservation efforts and begins writing and plublishing books on human interactions with nature. Jan 1, 1972 James Lovelock He established the Gaia Theory stating that all organic and inorganic parts of an environment come together to form an interconnected complex system. Jan 1, 1978 Lois Gibbs Mother of the Superfund, Lois Gibbs became a major proponant of toxic chemical control following the Love Canal Incident. Jan 1, 1979 Armory Lovins Begins to become highly active in the fields of natural resource management and energy management. Jan 1, 1981 James Hansen Major researcher in the field of climatology and using models he developed for the Venusian atmosphere to relate to climate change and patterns in Earth's atmosphere. Jan 1, 1987 Eugene and Howard Odum Pioneering the study of dynamic environments and the mitigation and prevention of pollution. Jan 1, 2001 Lester Brown Founder of Earth Policy Institute with an aim for planning for a economically and environmentally sustainable globe.