What should I ask Paul Gillingham?

Yes, I will be doing a Conversation with him.  He is a Professor of History at Northwestern, specializing in Mexico and to some extent the Caribbean.  He has translated a Mexican book on Edgar Allan Poe.  I am learning a good deal from his new 700 pp. book Mexico: A 500-Year History, and I very much like his earlier work on Mexico and violence.  Here is an NYT review of the new book.

So what should I ask him?