‘mistakes, contradictions, fabrications, nonsensical statements…and even a libelous claim’

A detailed review of Mann’s book: The Hockey Stick and the Climate Wars as it relates to the Wegman report to Congress

By Brandon Shollenberger


Michael Mann recently published a book named The Hockey Stick and the Climate Wars. It was generally well-received, quickly garnering many positive reviews. Even Henry Waxman, a sitting Congressman, and Bill Nye the Science Guy praised the book. Unfortunately, while many people liked the message of the book, it seems few read it carefully. The book contains many mistakes, contradictions, fabrications, nonsensical statements and even a libelous claim based on an obvious misrepresentation.

The last of those is obviously the most serious. Michael Mann began receiving a large amount of attention after he published two papers in the late nineties, creating his “hockey stick.” A few years later, his work was criticized by the authors Stephen McIntyre and Ross McKitrick, leading to a controversy that would rage on for years. Eventually, two reports were commissioned by the United States Congress to study the controversy. The lead author of one of those reports was Edward Wegman, a distinguished statistician from George Mason University.

This report, commonly known as the Wegman Report, was highly critical of Mann’s work. In turn, it was criticized by defenders of Mann. One such criticism involves how much “collaboration” there was between McIntyre, Wegman and Wegman’s co-authors. The claim is basically that the Wegman Report repeats McIntyre’s work and conclusions without due consideration. Mann doesn’t spend much time on this criticism in his book, but what he says is very important:

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About Tom Harley

Amateur ecologist and horticulturalist and CEO of Kimberley Environmental Horticulture Inc. (Tom Harley)
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