Paul Brousse was a French socialist, leader of the possibilistes group. He was active in the Jura Federation, a section of the International Working Men's Association (IWMA), from the northwestern part of Switzerland and the Alsace. He helped edit the Bulletin de la Fédération Jurassienne, along with anarchist Peter Kropotkin. He was in contact with Gustave Brocher between 1877 and 1880, who became anarchist under Brousse's influence. Paul Brousse edited two newspapers, one in French and another in German. He helped James Guillaume publish its bulletin.