"On the City of God" (De Civitate Dei) - in many ways the final work of the philosopher and theologian Blessed Augustine, written under the impression of the capture of Rome by Alaric in 410 and consisting of two main parts: book. I - X, devoted mainly to Roman history and religion, explain the reasons for the crisis and the inevitability of the fall of pagan civilization; book XI-XXII describe the history and the coming triumph of Christianity. According to Augustine, the goal of history (and its end) is the appearance of the City of God as a community of the righteous, united by the state of "the impossibility of sinning." At the same time, he believed that secular state power was given to people from above, so that there was at least some order in the world, therefore, in accordance with the principle "God is God, Caesar is Caesar" people should obey the legitimate ruler.