According to Michael Minkenberg, Mohler's ideas owed more to the Nouvelle Droite strain associated with GRECE than the Ostpolitik-derived ideas of a strong German state associated with contemporaries such as Robert Spaemann and Gerd-Klaus Kaltenbrunner.
While the plan was denounced as radical at the time, it helped pave the way for Brandt's Ostpolitik, as well as indirectly influencing some developments within the European Union, such as a European common security policy) and the eventual reunification of Germany.
Together with Günter Grass, he became engaged with the Social Democratic Party and aided the Ostpolitik of Willy Brandt.