 Legitimate individual or collective discretionary activity undertaken within an institution is typically facilitated by a rational internal structure—including role structure—, and by a rational institutional culture. By rational, it is here meant internally consistent, as well as rational in the light of the institution’s purposes. For instance, a hierarchical role structure might be rational in one institution, e.g. a defence force, but not another, e.g. a university. Again, a culture of greed might undermine an institution’s purposes, e.g. in a financial institution.