[2] He became active in the Action française student movement during the latter part of World War II and participated in their national congress in April 1944 in Lyon, presenting a lecture titled "Revolution or restoration: a constant of a new order.
[4] Later, he taught in higher education, teaching at the Université de Paris and Paris-Sorbonne University (Paris-IV) as an assistant professor and lecturer in English.
Natter later collaborated with the traditionalist Catholic and anti-communist journal Itinéraires, where he expressed strong opposition to university reforms and "Marxist cultural revolution" in education.
In response to the events of May 1968, Natter founded FACLIP (Faculté libre internationale pluridisciplinaire), a private university intended to counter perceived ideological biases in public institutions.
The faculty received financial support from the French state and the city of Paris until the 1990s, despite its controversial alignment with traditionalist Catholic and nationalist principles.