Moral luck concerns cases where praise, blame, or moral significance depends on factors outside an agent’s control. Discussions distinguish luck in outcomes, circumstances, constitution, and the causal history of choices. The pressure comes from holding people responsible while recognizing how deeply their opportunities and dispositions depend on chance.
Resultant luck concerns what follows from a choice; circumstantial luck concerns the situations someone encounters; constitutive luck concerns the character and capacities with which they act. These forms overlap but create different comparisons. A person may never face a severe test, or may possess habits formed under conditions they did not choose. The question is how moral evaluation can remain meaningful while recognizing that agency develops and operates within circumstances that no individual fully controls.