So is it still possible to pull back from the brink of America's Europeanization? Mr. Mansfield is optimistic. "The material for recovery is there," he says. "Ambition, for one thing. I teach at a university where all the students are ambitious. They all want to do something with their lives." That is in contrast to students he has met in Europe, where "it was depressing to see young people with small ambitions, very cultivated and intelligent people so stunted." He adds with a smile: "Our other main resource is the Constitution."