In 1919 Riva-Agüero left for an extended stay in Europe and whilst there he came into contact with the works of radical Catholic rightist authors such as Jacques Bainville and Charles Maurras and soon became a disciple of their ideas.
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From then on, he and other members of Action Française (like Jacques Bainville, Jean Rivain, and Georges Valois) interested in Sorel's thought discussed the similarity between the movements in Action Françaises conferences and in essays published in the movement’s newspaper, hoping to form a collaboration with revolutionary syndicalists.