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摘要

Humanity is doomed. Or it was in 1798, when English scholar Robert Malthus published his influential .An Essay on the Principle of Population. Malthus predicted that unchecked growth in human numbers would condemn our species to a "perpetual struggle for room and food" and an unbreakable cycle of squalor, famine and disease. Nearly two centuries later, biologist Paul Ehrlich was no less pessimistic. We had exceeded the planet's "carrying capacity", he declared in his 1968 bestseller The Population Bomb. "The battle to feed humanity is over. Sometime between 1970 and 1985, the world will undergo vast famines. Hundreds of millions of people are going to starve to death."