is the former director of the Berlin Social Science Center. Since 2020 he has been a Senior Fellow at the Democracy Institute of the Central European University in Budapest. His most recent work, entitled Im Zwielicht – Zerbrechlichkeit und Resilienz der Demokratie im 21. Jahrhundert (In the Twilight – On the Fragility and Resilience of Democracy in the Twenty-First Century) was published by Campus Press in September, 2023.