Plato
428–348 BC · Ancient Greek
Constitutions degenerate in a fixed cycle, and revolution follows the corruption of the ruling class.
The first extended account of political revolution in the Western tradition appears in the eighth and ninth books of Plato's , where the changes of constitutions are set out as a descending sequence. Aristocracy, the rule of the wise, gives way to timocracy when the guardians come to prize honor above wisdom; timocracy to oligarchy when honor yields to the love of wealth; oligarchy to democracy when the poor, grown numerous and resentful, prevail over the rich; and democracy to tyranny when an excess of liberty disposes a people to accept the protection of a popular leader. Each of these transitions is a revolution in the sense of a change in the form of government, and each, on Plato's showing, proceeds from a corruption within the class that rules rather than from any pressure applied from without.
Since the city is treated in the as an image of the soul writ large, every constitution has its answering type of man: the timocratic man ruled by spirit, the oligarchic by the appetite for gain, the democratic by appetites acknowledging no order among themselves, and the tyrannical by the most lawless of them. The political change and the change of character proceed together. Plato also observes what later writers on faction repeat, that an oligarchical city is not one city but two, the city of the rich and the city of the poor, dwelling in the same place and plotting against one another. This division of the state along lines of property is discussed more fully under the ideas of Oligarchy and Wealth.
Whether the sequence Plato describes is a necessary order or only a likely one has been variously answered. His inquiry, in any case, is directed to the causes and the succession of constitutional change rather than to the question, prominent in later theory, whether rebellion can be justified. He suggests that the descent might be arrested by rulers who govern from knowledge rather than from interest, and by an education that forms such rulers, though he does not appear confident that either will be found. The related problems of the tyrant's origin and his methods are treated under Tyranny.
"The ruin of oligarchy is the ruin of democracy ... And this exclusive love of freedom and regardlessness of everything else, is the cause of the change from democracy to tyranny."
"And democracy comes into power when the poor are the victors, killing some and exiling some, and giving equal shares in the government to all the rest."
Plato's ordering of the constitutions supplied the terms in which later writers stated their own accounts. Aristotle grants that constitutions change into one another, but denies that they change in any fixed order, and in the fifth book of the he examines the causes of revolution in each form of government separately. Those modern writers who conceive revolution as carrying a society forward rather than downward, Marx among them, reverse the direction of Plato's sequence while retaining his supposition that political change follows from causes within the social order itself.
Key work: Republic