During the Russian Revolution he was expelled from the country, and moved to Paris[4] where he completed his secondary education at the Lycée Saint-Louis in the mid-twenties.
[citation needed] In 1929, Marc and Denis de Rougemont organized a meeting spot for religious and ecumenical discussion of social and political issues, le Club du Moulin Vert.
During this time he co-authored Traditions socialistes françaises (Les Cahiers du Rhône, La Baconnière, octobre 1944).
As a founder of the Centre international de formation européenne (CIFE) in 1954, he participated in the organization of the Hague Congress.
He lectured extensively until his retirement on this subject at the Centre international de formation européenne and Centre international de formation européenne et l'Institut européen des hautes études internationales (now renamed L’Institut européen-European Institute) in Nice which he founded.