In this compelling account of the origins and evolution of our secular worldview, Theo Hobson shows how Christian values continue to underpin our public morality, how faith remains indispensable to Western humanism, and how atheistic humanism represents a dead end. At the same time, he offers a timely warning against the dangers of a religious-secular culture war, given the radically politicized and destructive forms of religion endemic in the world today. Here is a fresh and provocative argument about religion and politics--but one that doesn't fit into the normal boxes. It suggests that although the public creed of the West is best described as "secular humanism" we can only really understand and affirm secular humanism if we see how firmly it is based on Christian norms and values. If we don't, the West is divided: mired in a stagnant stand-off between fundamentalist atheism and an equally hard-line Christian theism. This book offers a more nuanced and historically more persuasive way forward, showing just how much our secular morality owes to Christianity, and how it can only find coherence through a new and positive view of its origins.