Jonathan Sumption is a former Justice of the Supreme Court, and a British medieval historian. He has given a defence of free speech along the lines of the classic liberalism of John Stuart Mill’s On Liberty (1859), where free speech was a necessary condition of individual freedom. If an individual did not have the right to dissent from the mainstream, then his/her individualism would be diminished. Thus, for Mill, if only one individual held to a certain position, it still would be necessary to defend that freedom as there was no certainty that the mob was right.