The Nineteen Letters on Judaism

From the Introduction: The first decades of the 19th Century reeled under the impact of the young French Revolution. The political upheaveal which followed in its wake was accompanied by a profound re-evaluation of the cultural and spiritual precepts prevalent heretofore. The new Liberalism unleashed the human mind to be the final authority; individualism and humanism relegated religion to be on an equal footing with the secular in life.