E.J. Dionne/The Washington Post
Buckley was determined to rid the right of the wing nuts. He was, to his everlasting credit, the scourge of an anti-Semitism that once had a hold on significant parts of the right. He also blasted the strange conspiracy theories of the John Birch Society. But most important were Buckley's efforts during the 1950s to resolve conservatism's contradictions. These exertions made it possible for Barry Goldwater and then Ronald Reagan to turn the remnant into a mighty political force.
If liberals are to exercise power again, they need to come to terms with Buckley's genius in understanding how ideas interact with the day-to-day needs of politics. Buckley was more intellectual than most practical politicians, and more practical than most intellectuals.
My main criticism of Buckley is that he was far too effective on behalf of a movement that I think should be driven from power. And if you read that as a compliment, you're right.