Carl von Clausewitz

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. Clausewitz was a realist in many different senses and, while in some respects a romantic, also drew heavily on the rationalist ideas of the European Enlightenment.

**Source**: [Carl von Clausewitz](https://en.wikipedia.org/wiki/Carl_von_Clausewitz) on Wikipedia.