Monetary Reform Author:John Maynard Keynes 1924. Keynes is undoubtedly one the most important figures in the entire history of economics. He revolutionized economics with his classic book, The General Theory of Employment, Interest and Money, which is generally regarded as the most influential social science treatise of the 20th Century, in that it quickly and permanently changed the way... more » the world looked at the economy and the role of government in society. No other single book, before or since, has had quite such an impact. This is his tract on Monetary Reform which was his contribution to the Cambridge cash-balance theory of money, then being developed by other Cambridge economists, Alfred Marshall, Arthur C. Pigou and Dennis H. Robertson.« less