Just listened to part of an interview with him on thr Other Side Of Midnight. He is a scholar of secret societies and right away I liked the cut of his jib. He gave the most elegant and concise explanation I think I've ever heard of how central control structures actually work, and with a somewhat resistant host. I'm sure with Greg at the helm we could go way deeper into it. He's also written a number of books on topics such as Odin devotees, rebel handbooks, and afterlife traditions.