Libertarianism (metaphysics)
Libertarianism is one of the main philosophical positions related to the problems of free will and determinism which are part of the larger domain of metaphysics. In particular, libertarianism is an incompatibilist position which argues that free will is logically incompatible with a deterministic universe. Libertarianism states that since agents have free will, determinism must be false and vice versa.
The task of the metaphysical libertarian is to reconcile free will with indeterminism.
Free will is the capacity or ability to choose between different possible courses of action.
A biker performing a dirt jump that, according to some interpretations, is the result of free will
A domino's movement is determined completely by laws of physics.
René Descartes
Thomas Hobbes was a classical compatibilist.