Past and present religious atrocities have occured not because we are evil, but because it is a fact of nature that the human species is, biologically, only partly rational. Evolution has meant that our prefrontal lobes are too small, our adrenal glands are too big, and our reproductive organs apparently designed by committee; a recipe which, alone or in combination, is very certain to lead to some unhappiness and disorder.

In November 2010 Hitchens cancelled a scheduled appearance in New York where he was to debate writers David Hazony and Stephen Prothero on the subject of the Ten Commandments. He also criticised Bush's support of intelligent design and capital punishment. He will tell it really well.

His anti-religion polemic God Is Not Great sold over 500000 copies. Hitchens died on 15 December 2011 from complications arising from oesophageal cancer a disease that he acknowledged was likely due to his lifelong predilection for heavy smoking and drinking.