In 1820, German mathematician Karl Friedrich Gauss proposed cutting an enormous right triangle into the Siberian pine forest, creating a monument to the Pythagorean theorem big enough to see from outer space.

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I've made a TV series, with help from the Open University, about three economic thinkers from the past who have something interesting to tell us about the financial crisis and how to get past it: Friedrich Hayek, Karl Marx and, tonight, Keynes.

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"I analyzed the business in 1995, and the only thing to do was to create our own movement and be recognized as a manufacture, " says Karl-Friedrich Scheufele, the fourth-generation scion vice president of Chopard.

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