The European Union is arguably facing the greatest existential threat in its history. One of its big four member states has left and the main opposition parties in France and Italy flirt with leaving, while Hungary and Poland drift away from liberal democracy, and the Russian and US presidents openly seek the union’s destruction. In The Tribalization of Europe: A Defence of our Liberal Values (Polity), Professor Wind identifies a common theme: tribalization, and a common remedy: an end to defeatism among liberal democrats. The majority isn’t always right, she says, and minorities need protection. Europeans – people as well as politicians – should stop taking the peace, prosperity and freedom they enjoy for granted and fight back against the populists. Marlene Wind is Professor of Political Science, Director of the Centre for European Politics at Copenhagen University, and is currently advising the European Commission of rule-of-law issues.