Droughts in Europe, resource-wars and global warming got us thinking about Thomas Malthus and his observations about population. Can we square the world's finite resources with the demands of 7 billion wannabe consumers? We talk positive checks, why hunter gathers were taller and ate better than the first farmers, plus the big Malthusian warning from the past, the Irish Famine. In the past two hundred years ,the world prized itself free of the Malthusian Trap via technology; could we be about to fall back into the grip of Malthus?

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