Diarmaid MacCulloch concludes his exploration of Christianity by looking at scepticism. Tracing its origins back to 17th-century Amsterdam, he examines the ideas of Jewish philosopher Baruch de Spinoza, who refused to see God as a supernatural being, while Isaac Newton quietly pursued a similar approach. He challenges the notion that faith has been steadily diminished by the advance of science, explores its resilience, and contemplates the future of the Church