Throughout the books, Augustine explains what he thinks is the truth behind Christianity. The religion was not what the Romans saw it to be, a punishment for abandoning traditional Roman religion for Christianity. He argued that the religion was not responsible for the downfall of Rome, but was a success to Romans. In the books, Augustine examines the different gods in the Roman religion, he explains that Rome has gone through defeats way before Christianity was introduced. He also explains his view of the Christian history and the two cities he believes in; the heavenly and the earthly. Each book describes a certain event or an idea that Augustine carries. Books 1 to 5 assesses the Roman religion. Books 6 to 10 explains the idea of the Roman religion. Books 11 to 14 describes the two cities (heaven and earth). Books 15 to 18 describes the history and progress of the two cities, and books 19 to 22 illustrates the future of the two