Each person is tuned like an instrument by history and temperament, and so is each group; the leader knows the triggers that set off unproductive responses, the hungers (for power and control, affirmation and importance, intimacy and delight) that can be exploited, and the water the leader is carrying for others, so that these tendencies can be managed rather than acted out under pressure.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.