Book excerpt: Spanning the turbulent decades between the World Wars, The Embrace of Unreason casts new light on the darkest years in modern French history. It is a fascinating reconsideration of the political, social, and religious movements that led to France’s move away from the humanistic traditions and rationalistic ideals of the Enlightenment and towards submission to authority—and the dramatic rise of Fascism and anti-Semitism. Drawing on newspaper articles, journals, and literary works of the time, acclaimed biographer and cultural historian Frederick Brown explores the forces unleashed by the Dreyfus Affair and how clashing ideologies and new artistic movements led France to an era of violence and nationalistic fervor.