Reviewing Peter Sattler's Augustus und der Senat (1960), J. P. V. D. Balsdon remarked that the background to the events which marked the establishment of the principate is a field which has been ploughed, even deep ploughed times without number. This must be agreed, and the sceptical need go no further than Lothar Wickert's article s.v. princeps in Pauly's RE xxii, 2 (1953), esp. 2002–2004, to confirm the truth of the remark. Much of the ploughing however has been concerned with the question, ‘By what legal right did Octavian/Augustus govern before, during, and after the period in which he claimed to have “transferred the res publica into the discretionary power of the Senate and Roman people”?’ The interest of this particular question has somewhat declined recently, perhaps rightly so, in an age in which there is a score of Octavians in the world, governing by right of victory in a civil war, and the governed populations tolerate these rulers without constantly examining their constitutional credentials, because they have one all-important virtue—they have put a stop to civil war.