 Founded by Pierre Gérôme, philosopher Alain, physicist Paul Langevin and ethnologist Paul Rivet, it edited a newsletter, "Vigilance", and boasted more than 6,000 members at the end of 1934.The CVIA had an important role in the unification of the three left-wing families (Radical-Socialist Party, French Section of the Workers' International (SFIO, socialist party) and Communist Party) which led to the Popular Front in 1936.It divided itself however on the attitude to adopt toward Nazi Germany