J. M. Roberts was from 1953 to 1979 a Fellow and Tutor of Merton College, Oxford. From 1979 to 1985 he was Vice-Chancellor of Southampton University. He then returned to the Wardenship of Merton, from which he retired to his native Somerset in 1994. He also spent time in the United States, holding posts at the Institute for Advanced Study, Princeton, Columbia and the University of South Carolina. In 1996 he was appointed CBE for his services to education and history.
He was the author of EUROPE 1880-1945, THE MYTHOLOGY OF SECRET SOCIETIES, THE PAIRS COMMUNE FROM THE RIGHT, THE AGE OF REVOLUTION AND IMPROVEMENT, THE FRENCH REVOLUTION, THE TRIUMPH OF THE WEST (originally a BBC Television series), THE PENGUIN HISTORY OF EUROPE and THE PENGUIN HISTORY OF THE TWENTIETH CENTURY. He also edited PARNELL'S HISTORY OF THE TWENTIETH CENTURY and was historical adviser on the BBC Television series THE PEOPLE'S CENTURY.
He died on 30 May 2003.