"Everything in war is very simple. But the simplest thing is difficult"
About this Quote
The subtext is an argument against the comforting fantasy of the “perfect plan.” Clausewitz wrote in the shadow of the Napoleonic wars, watching Europe learn that mass armies and fast campaigns could shatter old rules overnight. He’s diagnosing what he later calls friction: the accumulation of small mishaps that turns straightforward orders into improvisation. Even the most basic requirement - coordination - becomes precarious when communication breaks, morale wavers, or intelligence is wrong by a mile. The enemy is not a fixed problem; it is a moving, deceptive force actively trying to make your simplest move fail.
The specific intent is practical, almost moral. Clausewitz is warning commanders (and politicians) that war’s danger lies in its apparent clarity. When leaders talk about conflict as if it’s merely a checklist, this sentence waits like a recoil: the checklist is real, and that’s exactly why it’s so easy to underestimate what it costs to execute.
Quote Details
| Topic | War |
|---|---|
| Source | Clausewitz, Carl von. On War (Vom Kriege), trans. Michael Howard & Peter Paret; Princeton University Press, 1976. See Book I, Chapter 1 ('What Is War?') — contains the line: "Everything in war is very simple, but the simplest thing is difficult." |
| Cite |
Citation Formats
APA Style (7th ed.)
Clausewitz, Karl Von. (2026, January 17). Everything in war is very simple. But the simplest thing is difficult. FixQuotes. https://fixquotes.com/quotes/everything-in-war-is-very-simple-but-the-simplest-32287/
Chicago Style
Clausewitz, Karl Von. "Everything in war is very simple. But the simplest thing is difficult." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/everything-in-war-is-very-simple-but-the-simplest-32287/.
MLA Style (9th ed.)
"Everything in war is very simple. But the simplest thing is difficult." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/everything-in-war-is-very-simple-but-the-simplest-32287/. Accessed 12 Feb. 2026.









