An understanding of common values and principles plays an important role in discussions on the further development of European integration and the increase in right-wing populist and protectionist tendencies in Europe. This relates to both the scientific debate and public opinion, as well as the policy of the European Union and its member states. This collected volume aims to address convergences and divergences, arguments and counterarguments in the German and Polish understanding of European integration, EU policies and bilateral relations through the lens of common values and principles. A predominantly younger generation of academics and analysts from Germany and Poland contributed to the collection. The approach was to present a volume that is multi-perspective, interdisciplinary and solution-oriented, with the overall objective of enriching German, Polish and European discussions on this subject by presenting new research findings, reflective questions, trenchant conclusions and possible joint courses of action. With contributions by Kai-Olaf Lang, Magdalena Musiał-Karg, Adam Jaskulski, Adrian Chojan, Mikołaj J. Tomaszyk, Maciej Cieślukowski, Adam Kirpsza, Ida Musiałkowska, Mariusz Ruszel, Jan Muszyński, Kamila Schöll-Mazurek, Marta Kozłowska, Erik Malchow, Oliver Tettenborn, Ireneusz Paweł Karolewski, Thomas Mehlhausen, Bartosz Rydliński und Weronika Priesmeyer-Tkocz.