What God Has Joined Together: The Christian Case for Gay Marriage

Underworld: The Mysterious Origins of Civilization

Pornography: The Secret History of Civilization

Manifesto for a Democratic Civilization: Civilization: The Age of Masked Gods...

Rise of the Terran Empire: The Technic Civilization Saga

Reason, Faith, and the Struggle for Western Civilization

How the Catholic Church Built Western Civilization

Against The Grain: How Agriculture Has Hijacked Civilization