  The political psychology of Books Eight and Nine raises a host of  questions, especially about the city-soul analogy (see   section 1.3  above). Is the account of political change dependent upon the account of psychological change, or vice versa? Or if this is a case of  mutual interdependence, exactly what accounts for the various  dependencies? It seems difficult to give just one answer to these  questions that will explain all of the claims in these books, and the full, complex theory that must underlie all of the claims is by no  means clear.