In this paper I criticize Cartwright's analysis of capacities and offe
r an alternative analysis. I argue that Cartwright's attempt to connec
t capacities to her condition CC fails because individuals can exercis
e capacities only in certain contexts. My own analysis emphasizes thre
e features of capacities: 1) Capacities belong to individuals; 2) Capa
cities are typically not metaphysically fundamental properties of indi
viduals, but can be explained by referring to structural properties of
individuals; and 3) Laws are best understood as ascriptions of capaci
ties.