This working paper examines the legacy of Keynes's General Theory of Employment, Interest, and Money (1936), on the occasion of the 70th anniversary of the publication of Keynes's masterpiece and the 60th anniversary of his death. The paper incorporates some of the latest research by prominent followers of Keynes, presented at the 9th International Post Keynesian Conference in September 2006, and integrates this with other work that has come out of the Keynesian tradition since the 1940s. It is argued that Keynes's contributions still provide important guidance for real-world policy formation.