What is money? Introduction / John Smithin -- 'Babylonian madness' : on the historical and sociological origins of money / Geoffrey Ingham -- Modern money / L. Randall Wray -- The property theory of interest and money / Gunnar Heinsohn and Otto Steiger -- The credit theory of money : the monetary circuit approach / Alain Parguez and Mario Seccareccia -- Money and effective demand / Victoria Chick -- The invisible hand and the evolution of the monetary system / Kevin Dowd -- Aristotle on money / Scott Meikle -- A Marxist theory of commodity money revisited / Steve Fleetwood -- A Marxist account of the relationship between commodity money and symbolic money in the context of contemporary capitalist development / Peter Kennedy -- Menger's theory of money : some experimental evidence / Peter G. Klein and George Selgin -- Dr. Freud and Mr. Keynes on money and capitalism / Gilles Dostaler and Bernard Maris -- The disappearance of Keynes's nascent theory of banking between the Treatise and the General theory / Colin Rogers and T.K. Rymes.