A History of God is a feature length 2001 documentary directed by Daniel Alpert and based on the New York Times bestselling book of the same title by Karen Armstrong. Both the documentary and the book detail the history of the three three major monotheistic religions: Christianity, Judaism, and Islam, particularly the evolution of the idea of a single god from its ancient roots and how the idea of a single deity morphed into religions as they exist in the present day.
The documentary examines the familiar images of the deity presented in the Bible and the Koran, as well as in early forms of religion, and identifies numerous key common traits between the interpretations of god between the worlds three largest religions. Ultimately if a single god does exist then worshipers of Christianity, Islam, and Judaism appear to all be worshiping the same figure.
The book is based on The New York Times bestselling book A History of God: The 4,000 Year Quest Of Judaism, Christianity, And Islam, authored by Oxford educated British historian Karen Armstrong and available in paperback, hardback, and kindle editions.