This lucid guide is essential reading. From Donald Trump to Recep Erdogan, populists are on the rise across the globe. But what exactly is populism? Should everyone who criticizes Wall Street or Washington be called a populist? What precisely is the difference between right-wing and left-wing populism? Does populism bring government closer to the people or is it a threat to democracy? Who are "the people" anyway and who can speak in their name? These questions have never been more pressing. In this provocative book, Jan-Werner Müller argues that at populism's core is a rejection of pluralism. Populists will always claim that they and they alone represent the people and their true interests. Contrary to conventional wisdom, populists can govern on the basis of their claim to exclusive moral representation of the people: if populists have enough power, they will end up creating.