Stewart Udall

My father Stewart Udall is rightly celebrated as a visionary statesman of the modern conservation movement. His legacy as Secretary of the Interior from 1961 to '69 is marked by such accomplishments as the creation of four national parks, six national monuments, eight seashores and lakeshores, 20 historic sites and 50 wildlife refuges. But I believe it is his influence on the way we think about conservation that may have the most lasting impact.

Nearly 50 years ago my father, who died March 20 at 90, wrote The Quiet Crisis to warn Americans against the overuse of natural resources and the...

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