We have now considered the varieties of the deliberative or supreme power in states, and the various arrangements of law-courts and state offices, and which of them are adapted to different forms of government. We have also spoken of the destruction and preservation of constitutions, how and from what causes they arise.
Of democracy and all other forms of government there are many kinds; and it will be well to assign to them severally the modes of organization which are proper and advantageous to each, adding what remains to be said about them. Moreover, we ought to consider the various combinations of these modes themselves; for such combinations make constitutions overlap one another, so that aristocracies have an oligarchical character, and constitutional governments incline to democracies.
When I speak of the combinations which remain to be considered, and thus far have not been considered by us, I mean such as these: when the deliberative part of the government and the election of officers is constituted oligarchical, and the law-courts aristocratically, or when the courts and the deliberative part of the state are oligarchical, and the election to office aristocratical, or when in any other way there is a want of harmony in the composition of a state.
I have shown already what forms of democracy are suited to particular cities, and what of oligarchy to particular peoples, and to whom each of the other forms of government is suited. Further, we must not only show which of these governments is the best for each state, but also briefly proceed to consider how these and other forms of government are to be established.