Tree sitters. Logger protests. Dying timber towns. An iconic species on the brink. The Timber Wars consumed the Pacific Northwest in the late 1980s and early1990s and led political leaders to ask scientists for a solution. The Northwest Forest Plan was the result. For most of the twentieth century, the central theme of federal forest management in the Pacific Northwest had been logging old-growth forests to provide a sustained yield of timber. During the 1970s and 1980s, however, a series of studies by young scientists highlighted the destructive impact of that logging on northern spotted...