Jeffrey Hart, Dartmouth College legend and one of the architects of the American conservative movement, has long disowned the policies of George W. Bush and the current Republicans. His latest essay is brutal:

Recall the Eisenhower Republican Party. Eisenhower, a thoroughgoing realist, was one of the most successful presidents of the 20th century. So was the prudential Reagan, wary of using military force. Nixon would have been a good secretary of state, but emotionally wounded and suspicious, he was not suited to the presidency. Yet he, too, with Henry Kissinger, was a realist. George W. Bush represents a huge swing away from such traditional conservative Republicanism.

But the conservative movement in America has followed him, evacuating prudence and realism for ideology and folly. Left behind has been the experienced realism of James Burnham. Also vacated, the Burkean realism of Willmoore Kendall, who aspired, as he told Leo Strauss, to be the 'American Burke.' That Burkeanism entailed a sense of the complexity of society and the resistance of cultures to change. Gone, too, has been the individualism of Frank Meyer and the commonsense Western libertarianism of Barry Goldwater.

The post-2000 conservative movement has abandoned all that to back Bush and has followed him over the cliff into our calamity in Iraq. On top of all that, the Bush presidency has been fueled by the moral authoritarianism of the current third evangelical awakening.

Hart wrote me recently to say: "Your term 'Christianists' is immensely useful." This from the man who was a conservative when Dinesh D'Souza, Laura Ingraham and Jonah Goldberg were in diapers.

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