Can nature be reconstituted, recreated or rehabilitated? And would the goal of doing so be a desirable one? There again, is wild nature intrinsically valuable, or are parks, gardens and farms sometimes preferable or of greater value? This cluster of questions arises from recent debates about preservation, restoration, wilderness and sustainable development. In discussing them I hope to throw some light on both the concept and the value of nature, and in due course on the attitudes which people should have towards it, the policies which should guide their practice, and thus on the proper role of humanity with regard to the natural world.