Key to the Science of Theology

'Key to the Science of Theology' is a classic work on Mormon thought and doctrine written by Parley P. Pratt, one of the original Twelve Apostles and a close associate of Joseph Smith. This small yet powerful book is an introduction to the first principles of spiritual philosophy, religion, law, and government, as delivered by the ancient prophets and restored in this age for the final development of universal peace, truth, and knowledge. It explores a wide range of topics, from theology and the decline of knowledge among the Jews and Gentiles to the destiny of the universe and the laws of marriage and procreation.