Every American is co-owner of the most magnificent estate in the world—federal public forests, grazing lands, monuments, national parks, wildlife refuges, and other public places. The writer Wallace Stegner famously referred to public lands as “America’s best idea,” but there have always been some who oppose the idea for ideological reasons, or because they have a vested economic interest. In the current decade, federal public lands have been under physical threat as never before, with armed standoffs and takeovers that the US government has proved stunningly unsuccessful at prosecuting in federal courts.