Religion within the Bounds of Bare Reason (German: Die Religion innerhalb der Grenzen der bloßen Vernunft) is a 1793 book by the German philosopher Immanuel Kant. Although its purpose and original intent has become a matter of some dispute, the book's immense and lasting influence on the history of theology and the philosophy of religion is indisputable. It consists of four parts, called "Pieces" (Stücke), originally written as a series of four journal articles. The titles of the four parts are: Part I: Concerning the indwelling of the evil principle alongside the good, or, Of radical evil in human nature. Part II: Concerning the struggle of the good with the evil principle for dominion over the human being. Part III: Concerning the victory of the good over the evil principle and the founding of a Kingdom of God on Earth. Part IV: Concerning service and counterfeit service under the dominion of the good principle, or, of Religion and Priestcraft.He strongly criticises ritual, superstition and a church hierarchy in this work. Source: Wikipedia (en)