A Momentary Flow

If continuing brain research does in fact show biochemical differences between the brains of those who help others and the brains of those who do not, could this lead to a “morality pill” — a drug that makes us more likely to help? Given the many other studies linking biochemical conditions to mood and behavior, and the proliferation of drugs to modify them that have followed, the idea is not far-fetched. If so, would people choose to take it? Could criminals be given the option, as an alternative to prison, of a drug-releasing implant that would make them less likely to harm others? Might governments begin screening people to discover those most likely to commit crimes? Those who are at much greater risk of committing a crime might be offered the morality pill; if they refused, they might be required to wear a tracking device that would show where they had been at any given time, so that they would know that if they did commit a crime, they would be detected.

But if our brain’s chemistry does affect our moral behavior, the question of whether that balance is set in a natural way or by medical intervention will make no difference in how freely we act. If there are already biochemical differences between us that can be used to predict how ethically we will act, then either such differences are compatible with free will, or they are evidence that at least as far as some of our ethical actions are concerned, none of us have ever had free will anyway. In any case, whether or not we have free will, we may soon face new choices about the ways in which we are willing to influence behavior for the better.
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Peter Singer, a professor of bioethics at Princeton University and a laureate professor at the University of Melbourne, is the author, most recently, of “The Life You Can Save.” Agata Sagan is a researcher.