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With Buckley gone, I sense that sort of moderating influence (for what it was worth) on American conservatism is now gone. Or there was at least the pretense of intellectual gravitas in his influence. I recall that The National Review did have the good sense to fire Ann Coulter, although I don't actually know if that was Buckley's work or someone else's.
At any rate, he's gone now, and it will be interesting to see whether the Right gets even crazier than it is now, or whether it will awaken before it goes much further down the road to self-destruction.