on Helping Writers become Authors:
The Ruler represents the Flat or “resting” archetype that bridges the Queen’s rise to power and the King’s eventual surrender of that same power. As such, the Ruler represents the potential period in a person’s life in which he or she is in a position of leadership.
This Ruler might be a literal head of state—Queen, King, President, Prime Minister, etc. Or the Ruler might be a CEO, general, admiral, lead scientist, patriarch or matriarch, captain of a small fishing boat, etc. What is important to this archetype (and what distinguishes it from the previous Flat archetype of Parent) is that the Ruler is not just “in charge” but is the undisputed authority within his or her sphere of influence.