In recent years, parties and candidates challenging key democratic norms have won unprecedented popular support in liberal democracies across the globe. Drawing on public opinion data from the World Values Survey and various national polls, we show that the success of anti-establishment parties and candidates is not a temporal or geographic aberration, but rather a reflection of growing popular disaffection with liberal-democratic norms and institutions, and of increasing support for authoritarian interpretations of democracy. The record number of anti-system politicians in office raises uncertainty about the strength of supposedly “consolidated” liberal democracies and highlights the need for further analysis of the signs of democratic deconsolidation.