The economic dynamic in Zimbabwe is perversely robust: while ordinary people suffer, black-market dealers and people with foreign bank accounts prosper, making them powerful stakeholders in the perpetuation of devastating economic policies.

If we wait until income inequality is much more severe, we will have a whole class of new superrich who will probably feel entitled to their wealth and will have the means to defend their interest. That's already gone far enough. We shouldn't let it become more extreme.

A single currency entails a fixed interest rate, which means countries can't manage their own currency to suit their own needs. You need a variety of institutions to help nations for which the policies aren't well suited. Europe introduced the euro without providing those structures.

Soon we saw that money going to women brought much more benefit to the family than money going to the men. So we changed our policy and gave a high priority to women. As a result, now 96% of our four million borrowers in Grameen Bank are women.

We used to think that you could spend your way out of a recession and increase employment by cutting taxes and boosting government spending. I tell you in all candour that that option no longer exists, and in so far as it ever did exist, it only worked on each occasion since the war by injecting a bigger dose of inflation into the economy, followed by a higher level of unemployment as the next step.

One of the market's virtues, and the reason it enables so much peaceful interaction and cooperation among such a great variety of peoples, is that it demands of its participants only that they observe a relatively few basic principles, among them honesty, the sanctity of contracts, and respect for private property.