Book 6
1320b
It is also fairly clear from these considerations how oligarchies ought to be organized. We must infer them from their opposites, reasoning out each form of oligarchywith reference to the form of democracy opposite to it, starting with the most well-blended and first form of oligarchyIn contrast with the first and best form of democracy, 2 init.—and this is the one near to what is called a constitutional government, and for it the property-qualifications must be divided into one group of smaller properties and another of larger ones, smaller properties qualifying their owners for the indispensable offices and larger ones for the more important; and a person owning the qualifying property must be allowed to take a share in the government,—introducing by the assessment a large enough number of the common people to secure that with them the governing class will have a majority over those excluded; and persons to share in the government must constantly be brought in from the better class of the common people. And the next form of oligarchy also must be constructed in a similar way with a slight tightening up of the qualification. But the form of oligarchy that stands opposite to the last form of democracy, the most autocratic and tyrannical of the oligarchies, in as far as it is the worst requires a correspondingly great amount of safe-guarding. For just as human bodies in a good state of health and ships well equipped with their crews for a voyage admit of more mistakes without being destroyed thereby, but bodies of a morbid habit and vessels strained in their timbers and manned with bad crews cannot endure even the smallest mistakes, so also the worst constitutions need the most safe-guarding.
1321a
Democracies therefore generally speaking are kept safe by the largeness of the citizen-body, for this is the antithesis of justice according to desert; but oligarchy on the contrary must manifestly obtain its security by means of good organization.
