Etymology
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environmentalism (n.)

1923, as a psychological theory (in the nature vs. nurture debate), from environmental + -ism. The ecological sense is from 1972. Related: Environmentalist (n.), 1916 in the psychological sense, 1970 in the ecological sense.

updated on October 27, 2012

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Definitions of environmentalism from WordNet

environmentalism (n.)
the philosophical doctrine that environment is more important than heredity in determining intellectual growth;
environmentalism (n.)
the activity of protecting the environment from pollution or destruction;
From wordnet.princeton.edu, not affiliated with etymonline.

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