A new Polish government is trying to restore the rule of law, after eight years in which the EU identified major threats to it under governments of the populist Law and Justice (PiS) party. The rule of law crisis in Poland has posed a challenge for the entire European Union, undermining its fundamental principles and values. Can the EU effectively defend itself against such threats? Which path should be chosen to restore the rule of law: revolution or evolution? These questions will be addressed by Dr Marek Safjan, a former president of Poland’s Constitutional Court and a judge on the European Court of Justice from 2009 until earlier this year.