Nicolas Guilhot and Ido Oren both contribute useful insights, in the paper Guilhot published in Behavioral Sciences, and in Oren’s review of it here. I would like to offer a more personal perspective based on my own experience. As a young History student at Columbia College from 1969 to 1973 I did, nevertheless, hover on the edges of the Political Science Department and its Institute of War and Peace Studies, the hotbed of IR at Columbia. From 1973 to 1981 I was a graduate student in IR at the Institute—and a direct observer of all of this. William T. R. Fox was my mentor, seconded by the nuclear weapons theorist Warner R. Schilling. Fox’s impact on the field has been dimmed by time but merits greater attention—it was he, after all, who coined the term “superpower,” and whose participation in a study group with Bernard Brodie led to the first systematic attempt to consider the international implications of the atomic bomb in The Absolute Weapon.