Abstract
Since the beginning of the 1970s, questions related to ecology have reached the forefront of policy discourse and progressively led to the adoption of the concept of sustainable development, which now appears to be a new worldwide objective. We argue that numerous writings of Keynes contain the premises of such a sustainable development. Indeed, Keynes's positions on uncertainty, money, the place of economics, arts, philosophy, etc. are consistent with a strong sustainability based approach. Finally, we try to offer some insights for an indispensable twenty-first-century post Keynesian sustainable development program.