Today, chess programs have become so good that even grandmasters sometimes struggle to understand the logic behind some of their moves.

The Indians and Chinese have become brilliant chess professionals. They get on a plane and play all over the world. This has led to dramatic pressure on incomes. Nowadays, the best chess player in Argentina can no longer make a living playing chess.

I think that a lot of the money - these big bills - is used to facilitate tax evasion and crime.

Marx's theory that only capitalists benefit from capitalism and workers are exploited was completely wrong. Nothing could have been further from the truth. Workers earned more as economies grew.

Cash is very easy to hide. It's easy to hoard. It's easy to move, especially these large bills.

Why are oil prices so low? First, energy consumption growth rates in developing markets have decreased. This is particularly noticeable in China. Second, new technologies are being developed and the shale gas revolution in the USA has taken place

The problem - at least in the United States - is not that people can't find jobs. The problem is that they're no longer finding jobs that provide them with dignity and decent social status.