can also be ill-advised, for reasons such as "delay of defeat" and the "weakening of credibility". Natural causes for a pause may include events such as the 2019 coronavirus pandemic. See also Outline of war Grey-zone (international relations) Notes References Bibliography Butler, Smedley (1935). War is a Racket. Chagnon, N. (1983). The Yanomamo. Holt, Rinehart & Winston. Clausewitz, Carl Von (1976). On War, Princeton University Press Codevilla, Angelo (2005). No Victory, No Peace. Rowman and Littlefield Fry, Douglas (2005). The Human Potential for Peace: An Anthropological Challenge to Assumptions about War and Violence. Oxford University Press. Fry, Douglas (2009). Beyond War. Oxford University Press. Gat, Azar (2006). War in Human Civilization. Oxford University Press. Howell, Signe; Willis, Roy (1990). Societies at Peace: Anthropological Perspectives. London: Routledge. Keegan, John (1994). A History of Warfare. Pimlico. Keeley, Lawrence (1996). War Before Civilization, Oxford University Press. Kelly, Raymond C. (2000). Warless Societies and the Origin of War, University of Michigan Press. Kemp, Graham; Fry, Douglas (2004). Keeping the Peace. New York: Routledge. Lebow, Richard Ned (2008). A Cultural Theory of International Relations. Cambridge University Press. Lindemann, Thomas (2010). Causes of War. The Struggle for Recognition. Colchester, ECPR Press McIntosh, Jane (2002). A Peaceful Realm: The Rise and Fall of the Indus Civilization. Oxford, UK: Westview Press. Metz, Steven and Cuccia, Philip R. (2011). Defining War for the 21st Century, Strategic Studies Institute, U.S. Army War College. Montagu, Ashley (1978). Learning Nonaggression. New York: Oxford University Press. Otterbein, Keith (2004). How War Began. College Station TX: Texas A&M University Press. Parker, Geoffrey, ed. (2008) The Cambridge Illustrated History of Warfare: The Triumph of the West (Cambridge University Press, 1995, revised 2008) online Pauketat, Timothy (2005). North American Archaeology. Blackwell Publishing. Sponsel, Leslie; Gregor, Thomas (1994). Anthropology of Peace and Nonviolence. Lynne Rienner Publishing. Strachan, Hew (2013). The Direction of War. Cambridge University Press. Turchin, P. (2005). War and Peace and War: Life Cycles of Imperial Nations. NY: Pi Press. Van Creveld, Martin. The Art of War: War and Military Thought London: Cassell, Wellington House Wade, Nicholas (2006). Before the Dawn, New York: Penguin. Walzer, Michael (1977). Just and Unjust Wars. Basic Books. External links An Interactive map of all the battles fought around the world in the last 4,000 years Timeline of wars on Histropedia Dispute resolution Ethics Violence