In 88 poor countries for which we have data, in each and every one of the 88, the PPP for food shows that poor people can buy less food than you would expect from the PPP that the World Bank is using. The reason for this is obvious on reflection. It has to do with the fact that most foodstuffs are tradable commodities: basic foodstuffs, such as rice, flour and beans, can easily be conveyed across national borders and their prices will therefore roughly mirror the exchange rates among currencies.

America is run by the rich and powerful in their own interest. To an extent that I think is hard to exaggerate, the intellectuals - academics, journalists and so on - are bought off. And that's a big change that happened in the United States in the last 30 or 40 years.

One citizen, or a few, may be powerless if all the rest are determined to benefit from the imposition of unjust supranational rules. But this excuse cannot work for large numbers. Just imagine 10 million US citizens saying in unison: "I am just one powerless citizen. There is nothing I can do to change my government's policies!"

Our global institutional arrangements - the basic ground rules that govern our world economy - are human-made. They don't exist naturally, nor are they God-given. We make these rules, those of the WTO [World Trade Organization] Treaty for instance, which fill tens of thousands of pages. These words have been strung together by human beings and are also interpreted and enforced by human beings.

There exist better models of decisionmaking, for the governance of states, corporations and other large organizations, for example in Germany. We need to study such models and promising pathways on which our existing decisionmaking procedures can be gradually reformed.

In order to prepare for meaningful change, we have to look at both sides of the problem. We need to examine the output of our political system, which is often very hostile to the poor abroad and hostile also to the poor and middle class domestically. And we must also look at the procedures through which this output is produced.

Economists operate with this image of the homo economicus, the rational economic agent, and while such agents are rare in the wider world, they are common in economics departments. Exemplifying the homo economicus paradigm, economists typically choose their research projects and hypotheses so as to promote their own careers, to maximize their lifetime income. This explains the astonishing pressures toward conformity in academic economics: how deviant views (except those by a few who have already achieved stardom) get crushed by an army of conformists.