Kingship, tyranny, aristocracy, oligarchy, democracy, and ochlocracy are a theory of decay, not a metaphor, why Polybius thought Rome had slowed the cycle, and why the U.S. early republic Founders still feared it.
POLYBIUS PRESENTS ANACLYOSIS AS THE NATURAL SEQUENCE through which simple constitutions pass. This is the cyclical theory of political evolution termed anaclyosis (Greek: ἀνακύκλωσις) that views the three basic forms of “benign” government as weak, unstable and prone to cyclical decay. Monarchy arises from the need for a single strong protector. It becomes kingship when the ruler governs by reason rather than force. Kingship decays into tyranny when the heirs treat the office as private property. The best men then overthrow the tyrant and establish aristocracy. Aristocracy decays into oligarchy when the few govern for their own enrichment. The people, injured by oligarchic rule, seize power and establish democracy. Democracy decays into ochlocracy when the many, accustomed to living on the property of others, follow demagogues into violence and license. At that point the cycle returns to a new monarchy (Polybius, Histories 6.3-9). In these books, Polybius (c. 200 – c. 118 bce) introduces the origins of origins of society and kingship (chapt. 5), the degeneration into tyranny and the rise of aristocracy (chapt. 6-7), the decay into oligarchy and the emergence of democracy (Chapter 8). During this age of corrupted descendants, the children of aristocratic rulers lose touch with hardship and public service, just as in the age of kingship preceding it. Driven by greed and arrogance, they convert the state into an oligarchy leading to democratic uprising. The populace revolts against the oppressive oligarchs, establish a democracy, taking governance into their own hands. Lastly, it eventually descends into mob rule and completes the Cycle. The sequence is not a literary device, but an account of the internal causes that destroy each pure form.
Rome, Polybius argues, had slowed the sequence by combining the three elements in one constitution. The consuls supplied the monarchical element of energy and command. The Senate supplied the aristocratic element of deliberation and continuity. The popular assemblies and the tribunes supplied the democratic element of consent and restraint. Because each part could check the others, no single element could complete its natural decay into the corresponding corrupt form. The mixed constitution did not abolish the tendencies Polybius described. It interrupted them by forcing each power to act through the others (Polybius, Histories 6.11-18). The result, in his view, was greater stability than any pure form had achieved.
The American Founders inherited both the diagnosis and the proposed remedy, yet they remained uneasy. Madison’s account of faction in Federalist 10 accepts that the causes of decay lie in human nature and in the unequal distribution of property. An extended republic might multiply factions so that no single one could dominate, but the multiplication itself was a concession that the pure democratic element remained dangerous. Hamilton’s defense of energy in the executive conceded that the monarchical element, if left unchecked, would slide toward the arbitrary power Polybius had called tyranny. Both writers treat the cycle as a standing risk rather than a metaphor. They differ from Polybius mainly in the institutional devices they add: representation, federalism, and an independent judiciary. The fear remains that any of the three elements, once released from the checks the others supply, will follow the path Polybius traced from its sound form to its corrupt counterpart.
The theory therefore functions as a standing constraint on constitutional design. A republic that allows one element to operate without effective resistance from the others has, on this account, already begun the movement toward the next stage of decay. Polybius thought Rome had delayed that movement. The Founders designed institutions they hoped would delay it further. Neither claimed the cycle could be abolished.
