Ulrich Schüren stresses that in 1918 the question of the expropriation of the former rulers could have been settled without any major problems, legitimised by the power of the revolution. To that extent, this was a failure of the revolution. Despite its failure, the referendum, had a significant indirect effect. After 20 June 1926, the referendum increased the willingness to compromise in the conflict between Prussia and the House of Hohenzollern so that it proved possible to conclude an agreement as early as October. Schüren also makes it clear that there were signs of erosion in the bourgeois parties. Mainly affected were the DDP and the DNVP, but also the Centre Party. Schüren suspects that the increasing lack of cohesion that was manifesting itself among the bourgeois parties contributed to the rise of National Socialism after 1930.