Definition
The Five Factors (or Five Constants) are Sun Tzu's framework for the strategic assessment that should precede any campaign. Introduced in the opening lines of Topic 1 of The Art of War, they are the five axes along which both sides of a contest should be measured before commitment:
- The Way (dao) — moral cohesion, the alignment of leadership and people, willingness to share fate.
- Heaven (tian) — timing, season, the temporal conditions that frame the contest.
- Earth (di) — terrain, distance, the physical and structural ground.
- The Commander (jiang) — the qualities of leadership: wisdom, reliability, humaneness, courage, strictness.
- Method (fa) — organisation, regulation, the delegation of authority, the deployment of resources.
From these five, Sun Tzu derives seven comparative questions — which ruler has the Way, which commander is the abler, whose side earth and heaven favour, whose rules are obeyed, whose troops stronger, whose soldiers better trained, whose rewards and sanctions more clearly ordained — which together form the temple calculation by which a campaign's outcome can be foreseen.
Why it matters
How it works
The framework's power comes from its systemic rather than individual focus. Only one of the five factors — the Commander — concerns individual capability. The other four — moral cohesion, timing, terrain, organisation — are about the system in which the individual operates. A great commander in a state with no Way, no organisation, and unfavourable timing will lose; a mediocre commander in a system aligned on all four other factors will often win.
The seven comparative questions force the analyst into specifics. You cannot answer "whose troops are stronger" with an impression; you have to compare. The discipline is the comparison: every comparison reveals an asymmetry, and the pattern of asymmetries — won, lost, even — predicts the contest.
Sun Tzu's claim is bold: do the comparison honestly, and victory and defeat can be foreseen. Most strategic failure is upstream — the comparison was skipped, or done badly, or its answers ignored.