Libertarianism (metaphysics)
Metaphysical libertarianism is the philosophical view that free will exists, that it is incompatible with determinism, and therefore that determinism is false. In the branch of philosophy known as metaphysics, libertarianism is one of the main positions related to the problems of free will and determinism.
Source: Wikipedia — Libertarianism (metaphysics) (CC BY-SA 4.0)