This chapter discusses the historical origin and development, religious scholarship, political elements, and legacy of the Qur'an. The Qur'an, the holy book of Islam, is the most recent of the major sacred scriptures to have appeared in human history. It includes the prophetic proclamations of Muhammad (570–632) in Arabic, collected after his death in definitive written form and meticulously transmitted through the centuries. More than a billion Muslims around the globe consider the Qur'an to be the eternal word of God, who “sent down” the scripture as his final divine revelation and commissioned Muhammad to be the last prophet to proclaim his divine will for all of humanity to follow.