The main threat to democracy is not violence or corruption or inefficiency, but simplicity. From the point of view of the theory of democracy, this book offers an update of our political concepts, which were thought in a time of relative social and political simplicity. This theoretical deficit corresponds to a political practice that simplifies and impoverishes our democracies. This book is aimed at those who do not believe in simple answers, but do not want to despair in the face of the complexity of the problems. It formulates a theory of democracy and government for the 21st century based on the assumption that the most promising renewal of our democracies will be the result of making them more complex.