 Consider, next, cases of the Brave New World variety—cases where children are subjected to intensive behavioral engineering from birth, in a way intended to make them accept their assigned roles in a rigidly hierarchical society. Everything depends on the details, but it is surely not implausible to think that the subjects of some Brave New World cases lack a morally significant freedom because their cognitive, evaluational, and volitional capacities have been stunted or impaired in certain ways: