Radical environmentalism and its progeny, eco-terrorism, is a modern phenomenon. It is a movement far removed from the elite conservationists of the late 1800s and the mainstream environmental groups that emerged later. Drawn from the same pool of concerned individuals who comprise memberships in groups like Greenpeace, the Sierra Club, and the Wilderness Society, disaffected environmentalists have turned from political lobbying to direct action in the form of widespread property destruction and other types of crime and terror. Here, the author exposes the activities of radical groups determined to make their mark in the movement to protect the earth and its creatures from those they view as predators. He covers the major groups as well as less well-known ones and provides a careful portrait of who they are, what they do, and how to address them.