A royalist, traditionalist, and member of Action Française, Alibert was one of the chief ideologues of the constitutional law that transformed the French Third Republic into an authoritarian state under the rule of Marshal Philippe Pétain.

[7] In keeping with the ideals of Action Francaise, he promulgated the law dissolving secret societies (Freemasonry amongst others) on 13 August 1940, aided in this project by other devout Catholics, notably Bernard Fay, administrator of the Bibliothèque Nationale, and Robert Vallery-Radot.

Their task was to root out about 15,000 Masonic dignitaries from public life, as part of an effort by militant right-wing Christians to displace, while taking revenge on, their 'secularising' enemies.

[9] The German Ambassador to France, Otto Abetz, wrote to von Ribbentrop on 8 October 1940 saying that "some (French) ministers, such as Alibert, Baudouin and Bouthillier, are hoping for an eventual restoration of the Bourbons".

[10] By mid-November that year Alibert, Yvres Bouthillier, Paul Baudouin, Marcel Peyrouton (Minister of the Interior), Jean Darlan and General Huntziger were putting pressure upon Pétain to have Pierre Laval dismissed from office, in which they were successful on 13 December.