sentences:  He discusses the different attitudes that American's have had toward nature since colonization and the changing uses and definitions of 'wilderness' in that context.Specifically, Nash describes the evolution of American wilderness conception through Transcendentalism, Primitivism, Preservationism, to Conservationism.Nash states that if wilderness is to survive, we must, paradoxically, manage wilderness – at the very least, our behavior towards the wilderness must be managed.