Man is part of nature. But what man regards reasonable in his or her action not necessarily must be reasonable from the viewpoint of nature. And very often it is not so since it is hard to imagine that nature - which has so far been tending towards developing diversity - could not suffer now due to the predominance of a single species. Thus it is high time to change our view on how a man-made economic system operates and to introduce into the set of main economic variables the forgotten Ricardian factor, i.e. territory, as only a handful of contemporary economists does. Not labor and capital, but territory is now emerging as the crucial factor determining and as well limiting the scope of human economic activity, and thus shaping the future of mankind. This is the issue the book deals with.