The whole structure of the world economy at the moment is not a sustainable one, and therefore completely different technical structure has got to come into existence. We can't say whether the transition process is going to involve a mass die-off of a large part of the human race, or if we'll get through it. We don't know how or where food is going to be produced, we don't know what basic production technologies we'll be using - but we do know that we've got to rapidly adapt to them, and that it's very hard for rapid adaptation of that kind to be achieved in an anarchic market system.