While Bill Clinton recently criticized US buy-American food assistance programs and ethanol subsidies, he also promoted food autarky:

Clinton criticized decades of policymaking by the World Bank, the International Monetary Fund and others, encouraged by the U.S., that pressured Africans in particular into dropping government subsidies for fertilizer, improved seed and other farm inputs as a requirement to get aid. Africa’s food self-sufficiency declined and food imports rose…

“Food is not a commodity like others,” Clinton said. “We should go back to a policy of maximum food self-sufficiency. It is crazy for us to think we can develop countries around the world without increasing their ability to feed themselves.”

Paul Collier in Foreign Affairs:

Politicians and policymakers do, in fact, have it in their power to bring food prices down. But so far, their responses have been less than encouraging: beggar-thy-neighbor restrictions, pressure for yet larger farm subsidies, and a retreat into romanticism…

The real challenge is not the technical difficulty of returning the world to cheap food but the political difficulty of confronting the lobbying interests and illusions on which current policies rest. Feeding the world will involve three politically challenging steps. First, contrary to the romantics, the world needs more commercial agriculture, not less. The Brazilian model of high-productivity large farms could readily be extended to areas where land is underused. Second, and again contrary to the romantics, the world needs more science: the European ban and the consequential African ban on genetically modified (GM) crops are slowing the pace of agricultural productivity growth in the face of accelerating growth in demand. Ending such restrictions could be part of a deal, a mutual de-escalation of folly, that would achieve the third step: in return for Europe’s lifting its self-damaging ban on GM products, the United States should lift its self-damaging subsidies supporting domestic biofuel…

Typically, in trying to find a solution to a problem, people look to its causes — or, yet more fatuously, to its “root” cause. But there need be no logical connection between the cause of a problem and appropriate or even just feasible solutions to it. Such is the case with the food crisis. The root cause of high food prices is the spectacular economic growth of Asia. Asia accounts for half the world’s population, and because its people are still poor, they devote much of their budgets to food. As Asian incomes rise, the world demand for food increases… There is nothing to be done about the root cause of the crisis — the increasing demand for food. The solution must come from dramatically increasing world food supply.

Collier’s essay provides many arguments for greater global integration and commercialization of agriculture. Where’s the evidence favoring food autarky as a means of increasing supply?