John Graham was a pioneer of economics and public finance in Canada. As most economists of his generation, he was fond of the writings of the great British economist John Maynard Keynes - clearly the greatest economist of the twentieth century. Being a macroeconomist myself, I thought the best tribute I could pay to John in this Lecture celebrating his memory was to present a short history of what has happened to Keynesian ideas over the last 65 years or so.