Synthesized answer
The provided passages do not contain enough information to answer the question about the central thesis of the text. The only passage available is the title of a book, "The quiet revolution: grass roots of today's wilderness preservation movement by Donald N. Baldwin" [1]. This title indicates the subject matter but does not reveal the author's central argument or thesis.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: The quiet revolution: grass roots of today's wilderness preservation movement by Donald N. Baldwin