Leadership requires will and skill, so it requires the whole person: heart, mind, spirit and guts, the convergence of intellectual, emotional, spiritual and physical intelligence. Leading adaptive change is not about a better argument or more facts; people who would rather keep the status quo than face the risks of change are held back in their hearts and guts, and to move them the leader must connect with their values, beliefs and anxieties, which is impossible without engaging the leader's own heart.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.