David Stannard (1992). American Holocaust: The Conquest of the New World, Oxford University Press, ISBN 0-19-508557-4. "During the course of four centuries - from the 1490s to the 1890s - Europeans and white Americans engaged in an unbroken string of genocide campaigns against the native peoples of the Americas." (p.147). "[It] was, far and away, the most massive act of genocide in the history of the world."(Prologue)