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.

If we offer a prize, so to speak, to anyone who manages to bring a country under his physical control - namely, that they can then sell the country's resources and borrow in its name - then it's not surprising that generals or guerrilla movements will want to compete for this prize. But that the prize is there is really not the fault of the insiders. It is the fault of the dominant states and of the system of international law they maintain.

The bottom half of humanity is living in severe poverty; not all of them are malnourished or severely deprived now, but they are extremely vulnerable to even small upsets in their income or in the prices they face of basic necessities, and when something like this happens, they can be thrown off kilter in terms of a disease of a family member or a change in food prices; anything like that can throw them into destitution.

If the Health Impact Fund were to be instituted, a single company would be in charge of a medical product all the way from its conception to the health improvements realized by actual patients. The company would be paid for health impact, and it would have to arrange the entire pipeline in between - all the steps of invention, of clinical testing, of getting marketing approval in many different countries, of wholesalers and retailers and prescriptions and so on - in a holistically optimal way.

Feudalism is an economic system where a few people own all the land and the others have no option but to be serfs on such a feudal estate. We now condemn feudalism. We condemn not merely the feudal lords but we condemn the whole structure of rules that sustained feudalism. I am asking people to think similarly about the world economy.

Think of US slavery in 1850, or the subjection of women. Both of these injustices could have been - and were! - defended by pointing out, quite correctly, that this situation of slaves and women had been improving throughout the preceding century. Slaves, in particular, were worked less hard, beaten and raped less frequently, better fed, and less often ripped apart from their families. So would a celebration of moral progress have been appropriate in 1850? Surely not. Slavery could have been and should have been abolished - then, if not before.

Our Supreme Court has lifted the practice of buying legislation to the level of a constitutional principle by repeatedly protecting corporate spending for and against political candidates, as well as promises and threats of such spending to bribe and blackmail such candidates, by appeal to the free-speech clause of the First Amendment.