# "The destruction of the Indians of the Americas was, far and away, the most massive act of genocide in the history of the world." David E. Stannard, American Holocaust: the Conquest of the New World (1992)
http://users.erols.com/mwhite28/warstat0.htm#AmericaIf you want to study the question of pre-Columbian population and its subsequent decline in detail, two good books to start with are David Henige, Numbers From Nowhere (1998) and Russell Thornton, American Indian Holocaust and Survival (1987).
Population of the Western Hemisphere in 1492 according to various experts:
![](http://users.erols.com/mwhite28/images/amer-pop.gif)
The problem, of course, is that by the time that the Europeans got around to counting the Indians, there were a lot fewer to count
I've graphed the estimates chronlogically to show that the passage of time and the gathering of more information is still not leading toward a consensus. Over the past 75 years, estimates have bounced around wildly and ended up right back where they started -- around 40 million.
I've also graphed the population of Europe in 1500 because this is magic number to which many of the estimates aspire. Native American history is traditionally treated as marginal -- a handful of primitive kingdoms that were easily overwhelmed by the most dynamic civilization on Earth -- but if it could somehow be proven that the Americas had even more people than Europe, then history would be turned upside down. The European conquest could be treated as the tail wagging the dog, like the Barbarian invasions of Rome, a small fringe of savages decending on the civilized world, wiping out or enslaving the bulk of humanity.