"Hybrid War in History." In Hybrid Warfare: Fighting Complex Opponents from the Ancient World to the Present. Cambridge: Cambridge University Press, 2012.

Hybrid Warfare: Fighting Complex Opponents from the Ancient World to the Present. Cambridge: Cambridge University Press, 2012.

Harmon, Christopher C.. "What History Suggests About Terrorism and Its Future." In The Past As Prologue. New York: Cambridge University Press, 2006.

"Does Military Culture Matter?" Orbis 43, no. 1 (1999): 27-42, quote on p. 27.

Murray, Williamson. "Military Culture Does Matter." FPRI Wire 7, no. 2 (1999).

"Innovation: Past and Future." In Military Innovation in the Interwar Period, 306. London: Cambridge University Press, 1998.