Donald Kagan is one of the most exacting scholars at Yale. And, when Yale colleagues–most of whom did not share my politics–and I would sit over coffees or beers and predict, 50 years from now, whose work would still be read, Kagan’s, Jonathan Spence’s, and Robin Winks’ would consistently top the list. That the Yale College Democrats would protest the choice of Kagan to give a lecture on the anniversary of 9-11 is very sad indeed.