Free will is becoming the subject of ever greater amounts of research. I want to look at the ethical questions that arise from the discussion.
Neuroscientists have found that they can produce urges to move limbs or other actions by stimulating parts of the brain. By extension some suggest that all actions are just a result of stimulation from our environment and there is no choice involved. This research has added weight to the idea that since we live in a material world governed by specific laws; all our actions are therefore determined, if not predictable. The debate continues while most of us live our lives convinced that we are making decisions.

Let’s assume for starters that we have no free will, but that our actions arise totally out of stimulation in our environment. Out of that assumption there are several issues of importance. As listed in Scanlon’s article on “Ethics and Free Will” they are personal responsibility, moral responsibility, and substantive responsibility.
The lack of free will means that personal responsibility is a mirage. Since we are governed by stimulus/ response, there is no need to consider decisions since they are made for us before we “decide”. This, for the sake of argument, includes the emotional and psychological response to what is happening in the world. If we are freed from personal responsibility, we are also freed from moral responsibility. Nothing is our fault since we are only reacting to external stimuli. It then becomes morally repugnant to punish people for their actions (except that we are programmed to do so). Since nothing is our fault and we have no control, then logically we cannot be held to any agreements or promises we might have made.
The ancients thought that a person’s life was determined by fate. The Norse sagas and Greek myths are all about people who fought against their fate and lost in the end to the inevitable. Oedipus kills his father and marries his mother because that was his destiny and no amount of struggle could change that. In fact the Greeks believed that the struggle, while heroic, only made things worse. Still, both the Greeks and the Norse had complex codes of behavior and ethics that assumed a person was responsible for their actions, regardless of their predetermined fate. In fact the working out of that fate was inextricably entwined with the breaking or following of those codes. The really interesting part of the mythologies is that the gods, who would presumably have immeasurable power, were themselves subject to fate.
The lack of free will and its effects on ethics was also a part of Calvin’s idea of the elect. Our status as righteous or damned was determined before we were born. Our only choice was to live our lives in harmony with what was already determined. Even God was considered to be bound by predetermination and prophecies. Because humans had no free will to choice salvation or damnation, God too lost the ability to choose.
The idea that we have no choice is more prevalent in our present day culture than we want to admit. Books, movies and music talk about falling in love, for example, as an irresistible force. This erotic attraction is so powerful that it can drive us mad, shatter present relationships, even cause us to commit murder, and it is all OK because we fell in love. There is also the flip side of the emotional spectrum where we talk about “losing control” because someone pushed our buttons. Road rage is not our fault because we were overwhelmed by the stupidity of the other drivers.

In spite of our sense that we aren’t calling the shots, or at least not all of them, we have created complex systems of laws and ethics that assume that we are in control and responsible for what we do. One possible reason for this is that we are pushed to assume responsibility as a reaction against the notion that we have none. It is a smoke screen that our brains create to keep us on track. Like a child’s toy steering wheel in a car, we think it controls the car when in fact we are controlled by the car’s movements. Ethics gives us the illusion of control. It also provides justification for our actions: I deserve to enjoy this meal; it is not just a stimulus/response mechanism. We are right to punish or even kill people who act contrary to our laws because we are protecting our community. Having justification means that we needn’t concern ourselves with the corollaries of our actions.
Now let us assume that free will does in fact exist, as this study suggests. This is not to say that there is no stimulus response mechanism or that we are completely in control of our actions at all times. Think of free will to be like breathing. Most of the time we breathe without thinking about it; the frequency of our breaths varies according to our activity without us needing to manage it. This is a very good thing since it would be overwhelming to try to control our breathing constantly to maintain the optimal flow of air into our lungs. There are times though when we take control and consciously decide to breathe deeply, or hold our breath, or exhale sharply.
Much of our lives is spent unselfconsciously responding to stimuli, yet there are times when we stop and make a deliberate decision to react differently than what the stimuli would suggest. We don’t punch out someone because we decide that it is contrary to our higher interests. Ethics in this scenario is the defining of our higher interest and ultimately of our species’ higher interest. They are the boundary between what is acceptable as unconscious action and when we must take conscious control and responsibility for our actions. Thus ethics assumes that we have personal responsibility; namely, we make choices for ourselves, and by moral responsibility we can be held responsible for those choices. We then are accountable for the contracts and agreements we make and we must honour our promises.
Ethics when we are responsible for our decisions must then measure our ability to make those decisions and the results of our actions. When our automatic reactions produce damage to others, we are still accountable for those actions and responsible to learn new ways of acting. The implication is that we must train our actions in such a way as our unconscious activity is as ethical as the reasoned and conscious decisions.
There is a third possibility when it comes to free will, which is that some have, or will have, free will while others do not. This scenario comes into play as we work on creating artificial beings. Right now there is work on making robots more and more autonomous. We would like space probes or military drones to be able to make decisions within certain parameters. If autonomy becomes self awareness, do we have the right to deny these new beings full free will? Will the evolution of consciousness in software/hardware mean that we will need to allow for the possibility that full autonomy and free will will mean that not only robots/AI will be able to choose to do harm, but that they must have the freedom to do so? Asimov’s Three Laws of Robotics in this sense removes that final possibility of choice from his self aware robots and makes then eternally slaves to their programming.
It isn’t just robotics and AI that gives rise to the question of the free will to do evil. Advances in neuroscience may result in a device that makes it impossible for a person to complete a particular action; say murder or rape. The use of such a device would require careful thought and ethical review. Do we have the right to remove the ability to make a choice, even a wrong choice from another person? It could be justified by the use of informed consent; namely wear this device or live your life excluded from the community. It might also be seen as a reasonable breach of the rights of the perpetrator in the protection of community.
The question of free will and ethics is not one that we can simply let slide, no matter on which side of the free will debate we sit on. It is important that think through our understanding of the implications of free will or the lack of it, but most particularly the ethics around the boundary between the two states of being.
References
http://academic.udayton.edu/jackbauer/Readings 595/Baumeister 2008 Free Will.pdf
http://www.newscientist.com/article/dn17092-possible-site-of-free-will-found-in-brain.html
http://www.sciencedaily.com/releases/2008/01/080129125354.htm
http://www.bu.edu/law/central/jd/organizations/journals/bulr/documents/SCANLON.pdf
http://blog.practicalethics.ox.ac.uk/2012/04/new-study-detects-free-will-in-the-prefrontal-cortex/
My dad used to say that the only exercise a person needed was from pushing yourself away from the table. Now I am 100 pounds overweight. Thank goodness I have no free will or I might feel guilty for not following my father’s dictum.