Sedeprivationism

He is known for his traditionalist Catholic positions and is an advocate of sedeprivationism.

Michel Louis Guérard des Lauriers, who developed a thesis similar to sedevacantism called sedeprivationism in the 1970s.

The terms sedeprivationism and sedeprivationist were coined by the late English Sedevacantist William J. Morgan.

Morgan was opposed to the Cassiciacum Thesis, a similar position to the Sedevacantist position, and is credited with naming that other position, sedeprivationism.

He then presented his thesis that the Chair of Peter might be vacant because Pope Paul VI was guilty of heresy (see sedevacantism and sedeprivationism).

Shortly after, Guérard des Lauriers reiterated his Sedeprivationism and commenced a polemical war with the Sedevacantists, including Ngo Dinh Thuc and Drs. Heller and Hiller.