[2] His early works such as La Légende blasphémée (1897), Toi (1897), Le Jour qu'on aime (1898) and Instants de Ville (1898) received good reviews.

[2] In 1917 Louise Bodin and Colette Reynaud founded the journal La Voix des femmes, to which the major feminists contributed including Nelly Roussel and Hélène Brion.

[6] In March 1918, Pioch, Séverine, Han Ryner, Léon Werth, Gérard de Lacaze-Duthiers, Génold and Maurice Wullens founded Franchise, a short-lived pacifist and socialist weekly.

[2] After World War I (1914–18), Pioch joined the Blacksmiths' Guild (Ghilde des forgerons), an actively pacifist intellectual organization.

He prepared the literary program of an event sponsored by the Socialist party at the Trocadéro on 31 July 1919 where 8,000 people paid tribute to the war dead.

[7] Pioch joined the League of Human Rights (Ligue des Droits de l'Homme) and was involved in the struggle led by Bernard Lecache in 1926–27 for Sholom Schwartzbard.

[2] Pioch wrote at the time for L'Ère Nouvelle, described as a sort of official organ of the radical party, as did the president of the League Victor Basch.

The honorary committee included Albert Einstein, Stefan Zweig, Upton Sinclair, Paul Langevin, Georges Duhamel, Charles Vildrac and Jules Romains.

[2] In a 1943 letter he wrote "I continue to purge, not without a certain intimate pride, the honor which is done me by the passions of the occupation to be booted out of the so-called Paris press, and, even, forbidden to publish at all.