 Moral luck occurs when an agent can be correctly treated as an object of moral judgment despite the fact that a significant aspect of what she is assessed for depends on factors beyond her control. Bernard Williams writes, “when I first introduced the expression moral luck, I expected to suggest an oxymoron” (Williams 1993, 251). Indeed, immunity from luck has been thought by many to be part of the very essence of morality. And yet, as Williams (1981) and Thomas Nagel (1979) showed in their now classic pair of articles, it appears that our everyday judgments and practices commit us to the existence of moral luck. The problem of moral luck arises because we seem to be committed to the general principle that we are morally assessable only to the extent that what we are assessed for depends on factors under our control (call this the “Control Principle”). At the same time, when it comes to countless particular cases, we morally assess agents for things that depend on factors that are not in their control. And making the situation still more problematic is the fact that a very natural line of reasoning suggests that it is impossible to morally assess anyone for anything if we adhere to the Control Principle.