By this means, we arrive at the discourse about free will, which has been debated for years. Indeed, it is surprising that, of all things, the human brain is called as the crown witness of determinism. For it is precisely the brain that is the organ whose growing complexity in the course of evolution has relaxed the rigid stimulus–response mechanism, thus enabling organisms to attain increasing degrees of freedom — seen from that point of view, it is the organ of freedom."
Thomas Fuchs - Ecology of the Brain. The Phenomenology and Biology of the Embodied Mind.