Abstract: Post Keynesian economics is a dissident school in macroeconomics based on a particular interpretation of Keynes. A brief intellectual history of Post Keynesian ideas is provided, along with a discussion of some important methodological questions. Three short-period macro models are outlined: Paul Davidson's aggregate supply–aggregate demand model, Michal Kalecki's two-class model, and Hyman Minsky's financial instability hypothesis. The Post Keynesian approach to economic growth is shown to focus on the expansion of aggregate demand, with a distinctive approach to monetary, fiscal and other dimensions of macroeconomic policy. In conclusion the future prospects of Post Keynesian economics are assessed.