Ordre Nouveau’s neither right nor left movement, based on personalism and revolutionary federalism, helped shape modern Catholic political culture in France, the National Revolution instituted by the Vichy regime, the post-war European movement, and the contemporary European New Right. It influenced European youth exchanges, veterans’ organizations, trade unions, religious groups, artists, and architects, even the executive of the French national railway system. In The Communitarian Third Way John Hellman introduces us to the non-conformist Alexandre Marc, a Russian Jew who became a Christian convert and full-time professional revolutionary.