1930

Emergence of the concept of "primitive simplicity."

by L. F. Kneipp, 5.30.1930

1933

"Robert Marshall emerged from over a year in Alaska's Brooks Range"

Nash pp. 322-323.

"Marshall added a warning that wilderness could be overused. Campsites could deteriorate into dustbowls."

"Marshall wanted to investigate the feasibility of managing land so that 'certain areas may still be preserved in what might be termed a super-wilderness condition'."

"By the 1950s the Sierra Club clearly understood that its members were part of the problem of wilderness preservation.... faced with a new problem of too much popularity for wilderness."