JEAN LEON JAURES (1859-), French Socialist leader, was born at Castres (Tarn) on the 3rd of September 1859.
Guesde, nevertheless, continued to oppose the opportunist policy of Jaures, whom he denounced for supporting one bourgeois party against another.
From this he passed to the Petite Republique, leaving it to found, with Jean Jaures, L'Humanite.
Jaures, in addition to his daily journalistic activity, published Les preuves; affaire Dreyfus (1900); Action socialiste (1899); Etudes socialistes (1902), and, with other collaborators, Histoire socialiste (1901), &c.
Jaures and Guesde, ceased to co-operate with the radicals and radical-socialists, and became known as the unified socialists, pledged to advance a collectivist programme.