Darwin's Pit Bull and High Priest of Ultradarwinism

From a review of Richard Dawkins' Greatest Show on Earth:

If Thomas Henry Huxley was famously "Darwin's bulldog", then Richard Dawkins is probably best described as "Darwin's pit bull". He gets his teeth into an argument, locks on and shakes it until submission is the only option. There's a certain glee when he admits to being "the devil's disciple" or the high priest of "ultradarwinism", and his admission has an undeniably macho swagger about it. Real men (and women) take the toughest line on natural selection. Suffering and pain in nature and humanity are merely there to service the genes. Anything else is "Sentimental, human nonsense. Natural selection is all futile." There is something bracing about belonging to this most astringent and clear-sighted set. Deluded theists! Wishy-washy agnostics! Welcome to the Fight Club. One is reminded of lines by Dawkins's favourite poet, WB Yeats: "Cast a cold eye / On life, on death. / Horseman, pass by."