As phizzy said Origins is hardly the equivalent of the bible or koran, no one has killed or started wars in the name of Darwin, no one has tried to dictate how you should live your life, or how you should have sex based on Origin of species.
True enough. Except insofar as every war is a Darwinian war -- competition for resources, murder of rivals, racist hatred, the joy of domination, etc., etc. All of these find their basis in pretty straightforward evolutionary biology. Of course, biologists are hardly to blame for any of this, but it's worth reflecting on the basic human drives that cause all these things we think are outrages. The atheists like to blame religion for acts that really belong to the human condition, generally. An observation that evolutionary biologists keep supporting.