 While at Oxford, Joll wrote a book on the Second International (1955) and a book on Léon Blum, Walter Rathenau, and Filippo Tommaso Marinetti, called "Intellectuals in Politics" (1960).In 1964 he published "The Anarchists", which showed his intertwined interests in the culture, events, political philosophy, and individual personalities forming the history of a Leftist movement.In 1967 Joll left St Antony's, Oxford to teach at the London School of Economics, as the Stevenson Professor of International History.