Diego Gambetta is a sociologist at Nuffield College, Oxford, working on theories of trust and signals. He is known for his book The Sicilian Mafia and his edited volume, Making Sense of Suicide Missions. While at Stanford, he will discuss his recent manuscript, "Engineers of Jihad" as well as his new book, Codes of the Underworld: How Criminals Communicate.

The international visitors seminar series provides an opportunity for the Humanities Center's international scholars in residence to engage with the Stanford community by presenting and discussing their recent work in a congenial environment. Stanford faculty, students, and affiliates meet over lunch to hear a brief, informal presentation and engage in vigorous discussion. The series seeks to foster the exchange of ideas across borders and across disciplines, with the particular goal of enhancing interactions between researchers in the humanities and the social scientists.