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 tell my children that a man like Bill Gates has a personal fortune of $100 billion. They can't even comprehend that. Then I explain that he has more money than some countries.

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.

I don't think it's time yet to eliminate cash, but I propose having a less-cash society, not a cashless one.

... far more people make a living as professional chess players today than ever before. Thanks partly to the availability of computer programs and online matches, there has been a mini-boom in chess interest among young people in many countries.

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