During his almost forty years of British exile, the Italian nationalist Joseph Mazzini was in contact with many of the leading figures of the age, British and foreign - including Mill and Carlyle, the Chartists, and exiles such as Marx, Herzen, and Bakunin. At this time Mazzini also wrote some of his most important works, including his major tome, The Duties of Man. He also closely followed the course of British radicalism while continuing his own program for Italian unification. This work analyses the effect of this exile on his writings and policies and his influence on the intellectual life of the period.