This book completes the Clarendon Aristotle Series edition of the Politics. One might assume that, since David Keyt’s contribution is the last of the four on the Politics, when Aristotle scholars agreed to write these volumes, he was fourth in line and so got stuck with Politics V–VI. Surely, one might think, few would choose Politics V–VI over Politics I–II, with its fascinating discussions of the fundamental nature of the polis, the infamous chapters on slavery, and the critique of the (...) communism of Plato’s Republic; or over Politics VII–VIII, which contains Aristotle’s presentation of the best political system; or even over Politics III–IV, with its important classification and discussion of the different types of political systems. But in fact, Keyt had been thinking about writing a commentary on Politics V–VI for some time: “The idea of writing a commentary on Aristotle’s study of faction and constitutional change was formed in the late 1960s during the period of political unrest in the United States connected with the Vietnam War. In the summer of 1971 I discussed the possibility of doing this volume in the Clarendon Aristotle Series with John Ackrill”. We can be happy that Keyt and Ackrill returned, over two decades later, to the idea of such a commentary, because the result is an excellent addition to the Clarendon Aristotle Series. (shrink)