Simple

The Heath brothers' framework for ideas that stick — SUCCESs — starts with Simple. The job of communicating is not to compress your idea but to find its core. The core is the one thing that, if the audience remembers nothing else, is what they should remember. Everything else is supporting evidence.

The chapter cites the Army's Commander's Intent doctrine as the canonical example. Plans rarely survive contact with the enemy; what survives is the commander's stated intent, the single sentence the troops can return to when the plan stops applying. Civilian organizations rarely write Commander's Intent; their plans accumulate into binders no one reads. The Heaths argue that the binder is a substitute for the harder work of identifying the core.

Simple is hard because finding the core requires deciding what to leave out — and most communicators are reluctant to leave out anything, since each piece of information feels important. The discipline is to keep cutting until only the core remains, then to communicate that core forcefully.

The practical move is to take any communication you're about to deliver — a memo, a pitch, a difficult conversation — and ask: if they only remember one sentence, which sentence should it be? Write that sentence. Lead with it. Cut everything that distracts from it.

The Army's Commander's Intent is the chapter's anchor: because detailed plans rarely survive contact with the enemy, the Army distills each operation into a single plain statement of the desired end-state, so that when circumstances change, soldiers can improvise toward the same core purpose. The Heaths generalize this into the discipline of finding the one essential idea and then expressing it compactly. Their business example is Southwest Airlines, whose CEO reduced strategy to 'THE low-fare airline,' a core so clear that any decision — whether to add a fancier meal, say — can be tested against it in seconds. They praise the journalist's inverted pyramid, which leads with the single most important fact rather than building to it, and they hold up proverbs as the ideal of stickiness: phrases like 'a bird in the hand is worth two in the bush' pack profound guidance into a compact, memorable form. Crucially, Simple does not mean dumbed-down or short for its own sake; it means relentlessly prioritized. A communicator who declares ten priorities has in effect declared none, so the work of Simple is the hard editorial labor of deciding what is truly the core and leading with it.