Unmoved mover
The unmoved mover (Ancient Greek: ὃ οὐ κινούμενον κινεῖ, romanized: ho ou kinoúmenon kineî, lit. 'that which moves without being moved'), or prime mover (Latin: primum movens), is a concept advanced by Aristotle as a primary cause, or first uncaused cause, or "mover" of all the motion in the universe. As is implicit in the name, the unmoved mover moves other things, but is not itself moved by any prior action.