Robert Kaplan:

Nevertheless, if Malthus is wrong, then why is it necessary to prove him wrong again and again, every decade and every century? Perhaps because a fear exists that at some fundamental level, Malthus is right. For the great contribution of this estimable man was to bring nature itself into the argument over politics. Indeed, in an era of global warming, Malthus may prove among the most-relevant philosophers of the Enlightenment.