Inspiring others means breathing spirit into them, and it is a skill that practice improves; it needs heartfelt listening (being connected to the people in front of you, attention to what they feel and need) and speaking from the heart (expressing the leader's own conviction, losses and hopes), so that people are moved below the neck as well as above it.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.