“The control of a large force is the same in principle as the control of a few men: it is merely a question of dividing up their numbers.”
Large and small are governed by the same principle; the only added difficulty is organization, which is solvable.
Chapter 5 — Energy — opens with a reassurance disguised as a claim: controlling a large force is the same principle as controlling a few men; it is merely a question of dividing up their numbers. Sun Tzu is demystifying scale before he builds his theory of momentum on top of it. Size adds no new physics, only the organizational work of subdivision.
A design studio of eight runs on everyone knowing everything — a shared table, one conversation. At thirty people the same habit becomes the bottleneck: every decision waits for a meeting that now has eleven attendees. Nothing about the craft changed; the division did not. The studio that thrived at scale did one thing: split into squads with named decisions, and kept the shared table for lunch instead of workflow.
Dividing numbers does not mean multiplying hierarchy — Sun Tzu’s divisions are fighting units, not layers of approval. The test of a good division is whether each part can act, not whether each layer can veto. Organizations that "divide" by adding signature chains have mistaken bureaucracy for structure.