Cambridge, Mass.

'We have now an American political party and a European one. Not all Americans who vote for the European party want to become Europeans. But it doesn't matter because that's what they're voting for. They're voting for dependency, for lack of ambition, and for insolvency."

Mr. Mansfield sat for an interview on Thursday at the Harvard Faculty Club. This year marks his 50th as a teacher at the university. It isn't easy being the most visible conservative intellectual at an institution that has drifted ever further to the left for a half-century. "I live in a one-party state and very much more so a one-party university," says the 80-year-old professor with a sigh. "It's disgusting. I get along very well because everybody thinks the fact that I'm here means the things I say about Harvard can't be true. I am a kind of pet—a pet dissenter."