Keynes on uncertainty and tragic happiness : complexity and expectations

1. Introduction -- 2. Rationality as reasonableness: probability -- 3. Complexity and incommensurability: multidimensional, heterogeneous and interdependent magnitudes -- 4. The methodology of critique: probability and classical economic theory -- 5. Uncertainty as Greek tragedy’s legacy -- 6. Happiness as Aristotelian tragic eudemonia -- 7. Aesthetics as sublime: ‘tragic beauty’ -- 8. Moral and rational conflicts and dilemmas -- 9. International relations: complexity, interdependence and multilateralism -- 10. Conclusions.