The evolution of the idea of God is traced from its ancient roots in the Middle East up to the present day.

The Jahwist (J) writes of very "intimate" encounters between Abraham and Yahweh, while the Elohist (E) "prefers to distance the event and make the old legends less anthropomorphic.

She identifies his roots in the Pharisaic tradition of Hillel the Elder and his effect on the Jewish conception of a god.

The book explores the rise of trinitarianism, leading to the Nicene Creed, and traces the evolution of the Christian conception of God and the Trinity in the respective Eastern and Western traditions.

[4] Armstrong discusses the rise of modern Christian religiosity, in particular the Protestantism of Martin Luther and John Calvin.