The thesis of the article is that processes of structural political change can be adequately understood only on the basis of a multi-dimensional concept of political legitimacy. It is argued that the most prominent account of the idea, namely Max Weber's typology of legitimate authority, is misleading because of both its incompleteness and its incoherence (II). Drawing on David Beetham, we instead propose to analytically differentiate between three universal, genetically linked dimensions of legitimacy: (1) a basically pragmatic one, (2) a (...) theoretically re flexive, and (3) a performatively expressive dimension (III). By means of this scheme it becomes possible to capture fundamental, regularly violent processes of legitimation, as well as historically different forms of legitimacy. Empirically, the usefulness of our proposal shall be shown by sketching, on the one hand, the formation of “early states”, and the emergence of modern revolutions on the other (IV). (shrink)