Italian patriot, born at Genoa; consecrated his life to political revolution and the regeneration of his country on a democratic basis by political agitation; was arrested by the Sardinian government in 1831 and expelled from Italy; organised at Marseilles the secret society of Young Italy, whose motto was "God and the People"; driven from Marseilles to Switzerland and from Switzerland to London, he never ceased to agitate and conspire for this object; on the outbreak of the Revolution in 1848 at Paris he hastened thither to join the movement, which had spread into Italy, and where in 1849 he was installed one of a triumvirate in Rome and conducted the defence of the city against the arms of France, but refusing to join in the capitulation he returned to London, where he still continued to agitate till, his health failing, he retired to Geneva and died (1805-1872).