Heather Selma Gregg is an associate professor at the Naval Postgraduate School's Department of Defense Analysis. She is the author of The Path to Salvation: Religious Violence from the Crusades to Jihad (Potomac Books, 2014) and coeditor of The Three Circles of War: Understanding the Dynamics of Modern War in Iraq (Potomac Books, 2010). She has spent time in several regions of conflict, including Palestine/the West Bank, Croatia, and Bosnia.