Free will skepticism maintains that what we do and the way we are is ultimately the result of factors beyond our control and because of this we are never morally responsible for our actions in the basic desert sense-the sense that would make us truly deserving of blame and praise, punishment and reward. In recent years, a number of contemporary philosophers have advanced and defended versions of free will skepticism or skepticism about moral responsibility, including Derk complain that adopting the skeptical perspective would have dire consequences for ourselves, society, morality, meaning, and the law. They fear, for instance, that relinquishing belief in free will and basic desert moral responsibility would leave us unable to adequately deal with criminal behavior, increase anti-social conduct, and undermine meaning in life.In response, free will skeptics argue that life without free will and basic desert moral responsibility would not be as destructive as many people believe. According to optimistic skeptics, prospects of finding meaning in life or of sustaining good interpersonal relationships, for instance, would not be threatened (see Pereboom 2001Pereboom , 2014Waller 2011;Pereboom and Caruso 2018;Caruso 2017b). And although retributivism and severe punishment, such as the death penalty, would be ruled out, incapacitation and rehabilitation programs would still be desert-based moral responsibility, rather than arguing for free will skepticism directly. This is because, regardless of the philosophical debate over free will, a profound pragmatic question remains: Would the consequences of giving up the belief in free will cause nihilism and despair as some maintain, or would it rather have a humanizing effect on our practices and policies, freeing us from the negative effects of free will belief? If it turns out that belief in free will, rather than being a good thing, actually has a dark side, then this would help remove one of the major obstacles in the way of accepting free will skepticism-e.g., concerns over its negative consequences. It would also support disillusionism over illusionism as the proper course of action for free will skeptics. In section I, I discuss two common concerns people have with relinquishing the belief in free will and argue that they are unfounded. In section II, I then make the case for the "dark side" of free will by discussing recent findings in moral and political psychology which reveal interesting, and potentially troubling, correlations between people's free will beliefs and their other moral, religious, and political beliefs.