First published in 1935, Religious Thought in France in the Nineteenth Century discusses various religious thoughts prevalent in France during the nineteenth century, along with prominent figures associated with them. The author explores Positivist Religion, Natural Religion, and Older and Newer Protestantism. He then talks about the modernist movement in France through the life and career of distinguished critic Alfred Loisy. The author goes on to examine the future of religion and the influence of Bergson and provides a commentary on the biblical and historical studies among Catholics, Catholic studies of Dogma and the preachers in Paris like Mgr. de Quélen, Jesuit Ravignan, Jesuit Félix, Père Hyacinthe and Monsabré, to name a few. Simpson concludes his book with a discussion on the influence of Church on literary men - Bourget, Huysmans, Faguet, and Brunetière.