Trump, Silvio Berlusconi, Marine Le Pen, Hugo Chavez - 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? In this provocative book, Jan-Werner Muller 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.