Lest conservatives be too proud, it's worth recalling that conservatism's rise was decisively enabled by liberalism's weakness.
William KristolFor all the talk about the bitterness and the partisanship in American politics, is it really that bitter and partisan? Think of American history. Think of Joseph McCarthy. Think of the New Left. Think of [George] McGovern. Think of [Ronald] Reagan. Think of George Wallace. We've had an awful lot of real extremism on both wings.
William KristolMaybe one thing that has happened is that the claims of non-partisanship of the mainstream media have been a little bit exploded. Mostly I'd say what, if anything has caused the change, are just the obvious technological changes - proliferation of easier access to getting your opinions out and the proliferation of media.
William Kristol