This document summarizes a presentation on citizenship at the national, regional, and international levels. It discusses why citizenship education is important now due to issues like climate change, migration, democracy in Europe, and combatting extremism. It also reviews what is known about citizenship from landmark studies and outlines the benefits for students, teachers, schools, parents, and wider society. Finally, it addresses challenges like defining citizenship and bridging the gap between policy and implementation, and highlights helpful developments like new studies and frameworks to guide citizenship education.