The hedgehog and the fox : an essay on Tolstoy's view of history /Karl Marx : his life and environment /Building letters 1960-1975 /Karl Marx, zijn leven en zijn werk /Selected writings /Personal impressions /Karl Marx. His life and environment.Karl Marx. His life and environment.Herzen, l'humanisme et la terreur.Four essays on liberty.Two concepts of liberty. An inaugural lecture delivered before the University of Oxford on 31 October 1958.Vico and Herder. Two studies in the history of ideas.The life and opinions of Moses Hess. The Lucien Wolf Memorial Lecture delivered in London, December 1957.Fathers and children : the romanes lecture : delivered in the Sheldonian theatre 12 November 1970 /The magus of the North : J.G. Hamann and the origins of modern irrationalism /