Aboriginal overkill overstated : Errors in Charles Kay's hypothesis.

In this article I critique Charles Kay's aboriginal overkill hypothesis, which states that Native Americans numbered 100 million or more in precolumbian North America, extensively humanized the landscape, and suppressed wildlife numbers, thus allowing wildlife browse to proliferate. By examining Kay's source use and pertinent information, I find that he makes four kinds of significant mistakes: exaggerations, failure to provide necessary data, errors of omission, and errors of logic. Through examples I illustrate that Kay's errors compromise his hypothesis. Kay uses Yellowstone National Park as his primary example of such a humanized area; in contrast, I suggest it is a relatively pristine area.