“From another perspective, free will is not illusory at all. So long as we have relatively undamaged brains and relatively normal upbringings, each of us has a very real capacity to execute and to inhibit voluntary action, thanks to our brain’s ability to control our many degrees of freedom. This kind of freedom is both a freedom from and a freedom to. It is a freedom from immediate causes in the world or in the body, and from coercion by authorities, hypnotists and mesmerists, or social-media pushers. It is not, however, freedom from the laws of nature or from the causal fabric of the universe. It is a freedom to act according to our beliefs, values, and goals, to do as we wish to do, and to make choices according to who we are.
The reality of this kind of free will is underlined by the fact that it cannot be taken for granted. Brain injuries, or unlucky draws from the lotteries of our genes and our environments, can undermine our ability to exercise voluntary behaviour. People with anarchic hand syndrome make voluntary actions which they do not experience as being theirs, while those with akinetic mutism are unable to make any voluntary actions at all. An awkwardly located brain tumour can transform an engineering student into a mass school shooter, as happened in the case of Charles Whitman, the ‘Texas Tower Sniper’, or engender in a previously blameless teacher a rampant paedophilia – a tendency which disappeared when the tumour was removed, and returned when it grew back.”