AMID an astonishing surge in food prices, which has sparked riots and unrest in many countries and is making even the relatively affluent citizens of America and Europe feel the pinch, faith in the ability of global markets to fill nearly 7 billion bellies is dwindling. Given the fear that a new era of chronic shortages may have begun, it is perhaps understandable that the name of Thomas Malthus is in the air. Yet if his views were indeed now correct, that would defy the experience of the past two centuries.

Malthus first set out his ideas in 1798 in “An Essay on the Principle of Population”. This expounded a tragic twin trajectory for the growth of human populations and the increase of food supply. Whereas the natural tendency was for populations to grow without end, food supply would run up against the limit of finite land. As a result, the “positive checks” of higher mortality caused by famine, disease and war were necessary to bring the number of people back in line with the capacity to feed them.


In a second edition published in 1803, Malthus softened his original harsh message by introducing the idea of moral restraint. Such a “preventive check”, operating through the birth rather than the death rate, could provide a way to counter the otherwise inexorable logic of too many mouths chasing too little food. If couples married late and had fewer children, population growth could be sufficiently arrested for agriculture to cope.

It was the misfortune of Malthus—but the good luck of generations born after him—that he wrote at an historical turning point. His ideas, especially his later ones, were arguably an accurate description of pre-industrial societies, which teetered on a precarious balance between empty and full stomachs. But the industrial revolution, which had already begun in Britain, was transforming the long-term outlook for economic growth. Economies were starting to expand faster than their populations, bringing about a sustained improvement in living standards.

Far from food running out, as Malthus had feared, it became abundant as trade expanded and low-cost agricultural producers like Argentina and Australia joined the world economy. Reforms based on sound political economy played a vital role, too. In particular, the abolition of the Corn Laws in 1846 paved the way for British workers to gain from cheap food imports.