Moral Luck

Immanuel Kant had a tidy view of human morality: your worth should depend entirely on what is under your control. Good intentions counted, bad ones condemned, and the random chaos of the universe was supposed to stay out of the ledger. But in 1976, philosophers Thomas Nagel and Bernard Williams looked at human behavior and realized that morality is deeply infected by luck.

Consider resultant moral luck, which reveals an uncomfortable truth about how we judge each other. Two drivers might make the exact same careless mistake, driven by the identical intent. One hits a pedestrian; the other hits a patch of empty road. According to strict intent-based ethics, they are equally guilty. Yet legal systems and human intuition punish the first driver far more harshly simply because the universe dealt them a worse outcome.

Nagel mapped out four distinct ways that luck quietly dictates our moral standing, touching not just on outcomes, but on the situations we happen to face, our basic character dispositions, and the causal chains of determinism that precede us. We cling to the control principle—the comforting idea that people should only be judged for what they can master—even as our institutions routinely violate it.

This might be because our moral psychology is stubbornly outcome-bound. When harm occurs, human intuition scrambles to assign blame, often ignoring the invisible hand of chance. Whether this moral luck is a genuine feature of morality or just a cognitive illusion remains fiercely debated. But it leaves us in a strange bind: our systems of justice and our gut reactions demand that the world be fair, while running on a reality where it manifestly is not.