Reflecting his background as a Catholic Rhinelander who had long chafed under Prussian rule, Adenauer believed that Prussianism was the root cause of National Socialism, and that only by driving out Prussianism could Germany become a democracy. In a December 1946 letter, Adenauer wrote that the Prussian state in the early 19th century had become an "almost God-like entity" that valued state power over the rights of individuals. Adenauer's dislike of Prussia even led him to oppose Berlin as a future capital.