In the best traditions of Foucault or Lukes, this is a short punchy essay in political realism, that acts as a refreshing antidote, or at least alternative, to normative accounts of legitimacy. Such realism might not be to everyone's taste but in an age of spin, Barker's focus on the self-justifications that those in power (and those who obey as well as those who rebel) seem to spend so much time and effort on is thought-provoking and bang up to date (even if his determinedly historical context sometimes makes the reader wish he would spend more time elucidating modern media-dominated theatre politics.) Although a realist account of individual actors and how their competing (or cohering) narratives constitute the political domain, his dual focus on political-social identity gives it an extra philosophical edge (I act as I am or I act therefore I am?)and stops him short of the charge of cynicism.
Witty and subversive in tone, never shy of its own erudition, it is a useful addition to the "standard" works on legitimacy for anybody studying Politics or Political Philosophy