Malthus's population theory

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…that high human density is bad. A few animal studies on crowding (of questionable generality for other animal species, let alone for human population) are quoted repeated to make the point that overcrowding produces pathological behavior. Nevertheless, people crowd to the cities, because on balance they find life there more rewarding than in other locales. In fact, there is evidence that from a number of points of view, urban life-high density living-is good for people.