Five economic challenges

Robert L. Heilbroner (March 24, 1919 – January 4, 2005) was an American economist and historian of economic thought. The author of some two dozen books, Heilbroner was best known for The Worldly Philosophers: The Lives, Times and Ideas of the Great Economic Thinkers (1953), a survey of the lives and contributions of famous economists, notably Adam Smith, Karl Marx, and John Maynard Keynes.