Question: The Prussian General Carl von Clausewitz is associated with what type of realism?

Vom Kriege (] ) is a book on war and military strategy by Prussian general Carl von Clausewitz (1780–1831), written mostly after the Napoleonic wars, between 1816 and 1830, and published posthumously by his wife Marie von Brühl in 1832.  It has been translated into English several times as On War.  "On War" is actually an unfinished work; Clausewitz had set about revising his accumulated manuscripts in 1827, but did not live to finish the task.  His wife edited his collected works and published them between 1832 and 1835.  His 10-volume collected works contain most of his larger historical and theoretical writings, though not his shorter articles and papers or his extensive correspondence with important political, military, intellectual and cultural leaders in the Prussian state.  "On War" is formed by the first three volumes and represents his theoretical explorations.  It is one of the most important treatises on political-military analysis and strategy ever written, and remains both controversial and an influence on strategic thinking. <SEP> Christopher Bassford (born 1953) is an American military historian, best known for his works on the Prussian military philosopher Carl von Clausewitz.  Bassford graduated from the College of William and Mary with a degree in history and honors for his dissertation on tactical nuclear weapons and completed his MA in American diplomatic history at Ohio University.  Subsequent to receiving his MA, he served five years on active duty as a U.S. Army field artillery officer, with tours in Korea and Germany.  He completed a Ph.D. in modern European history at Purdue University and became director of studies in the theory and nature of war at the U.S. Marine Corps (USMC) Command and Staff College, then associate professor of National Policy Issues at the U.S. Army War College.  He was Professor of Strategy at the National War College (NWC), in Washington, D.C., from 1999 until 2012, when he joined the faculty of the College of International Security Affairs (CISA) as part of the JSOMA program supporting U.S. Army Special Operations Command (USASOC).  He is the webeditor of The Clausewitz Homepage, a large educational website that has been on-line since 1995. <SEP>  Modern thinkers associated with classical realism are Carl von Clausewitz, Hans Morgenthau and Reinhold Niebuhr. Classical Realism is a theory of International Relations established in the post-World War II era that seeks to explain international politics as a result of human nature.  The theory is associated with thinkers such as Niccolò Machiavelli and Thomas Hobbes.  Classical Realist thought has since been overshadowed by Neorealism after Kenneth Waltz' work became more widely accepted due to the rise of Structuralism in North American International Relations scholarship which favored the latter's emphasis on rationality rather than human nature as cause for political conflict. <SEP> Carl Philipp Gottfried (or Gottlieb) von Clausewitz ( ; 1 June 1780 – 16 November 1831) was a Prussian general and military theorist who stressed the "moral" (meaning, in modern terms, psychological) and political aspects of war.  His most notable work, "Vom Kriege" ("On War"), was unfinished at his death.