Brizon was elected a national deputy for
Allier in April 1910 on the socialist platform. He demanded pensions for workers, nationalization of insurance, mines, railways and progressive inheritance and income taxes. He was reelected in 1914. He was noted for his defense of the rights of tenant farmers. After the outbreak of
World War I (July 1914 - November 1918) Brizon joined the
union sacrée whose members agreed to cooperate with the government, as did all members of the Socialist party. Later he became opposed to the
union sacrée, and joined the pacifist
Comité pour la reprise des relations internationales (Committee for restoring international relations). An international socialist
conference at Kienthal in Switzerland was arranged for the end of April 1916, a follow-up to the 1915
Zimmerwald Conference. The
Confédération générale du travail (CGT, General Confederation of Labor) leaders
Alphonse Merrheim,
Albert Bourderon and
Marie Mayoux were expected to represent France, but were refused the passports they needed to travel. Three delegates from the SFIO led by
Alexandre Blanc were able to attend as deputies with parliamentary immunity. Brizon and
Jean Raffin-Dugens accompanied Blanc. All three were teachers by profession. At the meeting, Brizon would not accept that the goal should be creation of a third International. He said the important thing was to press the
International Socialist Bureau to work towards peace. On their return from Switzerland, the three deputies were the targets of a violent press campaign in which they were accused of being defeatists, traitors and spies. They were repudiated by leaders of the Socialist party. On 24 June 1916 Brizon, Blanc and Raffins-Dugens refused to vote for war credits. In his speech on that occasion Brizon paid tribute to the "brave minority of German socialists". He said they and he remained faithful to the old decisions of the socialist international, that if war broke out it was the duty of the working classes to try to end it quickly. For his outspoken opposition to the war Brizon was temporarily suspended from parliament in 1916. After returning to his seat as deputy, he held to his position and asked for a referendum by secret ballot on the question of war or peace. He also asked for an inquiry into the position the government had taken regarding sending delegates to the
Third Zimmerwald Conference, held in 1917 in
Stockholm. In February 1917 the Committee for the Resumption of International Relations split, with Brizon, Raffin-Dugens and Bourderon joining the SFIO minority led by
Jean Longuet, while the socialists
Fernand Loriot,
Charles Rappoport,
Louise Saumoneau and
François Mayoux took control of the committee. Merrheim withdrew to concentrate on union work. Brizon launched the pacifist
La Vague (The Wave) in January 1918. He had to give up this journal, but later published the
Bloc des rouges (Red bloc). ==Later career==