John Stuart Mill observed in his Autobiography that he was a rare case in nineteenth-century Britain because he had not lost his religion but never had any. He was a freethinker from beginning to end. What is not often realized, however, is that Mill's life was nevertheless impinged upon by religion at every turn. This is true both of the close relationships that shaped him and of his own, internal thoughts. Mill was a religious sceptic, but not the...