KEYNES, John Maynard, 1st Baron (1883-1946), economist and mathematician, and father of the modern economic stimulus. His groundbreaking treatise, The Means to Prosperity (Macmillan, 1933), showed conclusively that counter-cyclical public spending can induce prosperity during an economic depression. His seminal work, The General Theory of Employment, Interest and Money (Macmillan, 1936), then showed that prosperity can be created in any other kind of economic climate, by first converting it into a depression.