All you need to know about this book is that Alston Chase has a vendetta against the Park Service. Chase is correct that the Park Service's vision of, and policies for, Yellowstone have changed over time, and have frequently been inconsistent, sometimes silly, and sometimes destructive. But he doesn't grant any leniency for the fact that the earlier, most destructive, policies occurred in the late 19th and early 20th centuries. And after all, the Park Service is a government agency - who in their right mind could be surprised that they've made mistakes? Most important, he damns both the early policy of active management and the present policy of letting most things happen naturally. It's clear that no action of the Park Service could ever satisfy Chase, because he doesn't really know what he wants. Chase has no substantive alternative management policy to propose - he's simply one of those annoying people (and we all know some of them) who never have anything helpful to say but are always quick to criticize.