Most presentations of the problem of moral luck invoke the notion of control, but little has been said about what control amounts to. We propose a necessary condition on an agent's having been in control of performing an action: that the agent's effort to perform the action ensured that the agent performed the action. The difficulty of satisfying this condition leads many on both sides of the moral luck debate to conclude that much of what we do is not within (...) our control, and, at the limit, underpins agential skepticism, the view that no one has ever been in control of having performed an action in the external world. We propose a response to the agential skeptic modeled on the epistemological disjunctivist's response to the skeptic about perceptual experience. According to agential disjunctivism, the necessary condition on control can be met, thus undermining agential skepticism and one motivation for the problem of moral luck. Our view can be understood as resisting moral luck not by shrinking the domain of robust moral evaluation but by refusing to contract the realm of robust control. (shrink)