What is the theme in God in the Dock; Essays on Theology and Ethics by C. S. Lewis?

Another theme in the story is the truth of Christianity. Perhaps Lewis's most important goal across the vast majority of the essays contained within God in the Dock is to defend the truth of Christianity. He tries to take most of the major challenges to Christianity head on, although he focuses on a small number of issues. First, while he gives an argument or two for God's existence, he generally argues instead that monotheism is superior to other general classes of worldview such as dualism, paganism and materialism.