Toward a sociology of international law:John Hagan and beyond

Socio-legal scholars these days devote themselves routinely to the study of international law. It was not always thus. In the late twentieth century, no more than a handful of law-and-society scholars asked themselves how international law worked. Even fewer ventured into the field. John Hagan was one of those who did and the first sociologist to study empirically—and rigorously—what we now call international criminal law. In this article, I use Hagan’s oeuvre to reflect on the intellectual history of international legal scholarship in the twenty-first century. I argue that Hagan brought three things to the study of international law: criminology, methodology, and ideology. I trace each of these contributions in detail, assess their intellectual import, and relate them to alternative ways of seeing international law. The story I tell is of a pioneering scholar who charted an empirical path toward the sociology of international law, but whose moral compass—acquired during his socialization in the Vietnam era—also occasionally blinded him to the dark sides of virtue.