τυραννία

Tyrannía in Greek means the rule of a tyrannos, from tyrannos (an absolute ruler, especially one who seized power without hereditary right). The word is probably not Greek in origin — it may be borrowed from Lydian or another Anatolian language. In its earliest Greek usage (seventh century BCE), tyrannos was descriptively neutral. Peisistratos, tyrant of Athens from 546 to 527 BCE, was remembered as a relatively benign ruler who promoted the arts and improved infrastructure.

The Athenian democracy, established after the overthrow of the Peisistratid tyranny in 510 BCE, transformed the word. Tyranny became the opposite of democratic self-governance. The Athenians developed ostracism — voting to exile any citizen who seemed to be accumulating too much power — as a preventive measure against tyranny. The word shifted from 'unconstitutional ruler' to 'oppressive ruler' to 'the worst form of government.' The transformation was political. Athens needed a villain.

The American Founders inherited the Greek horror of tyranny. The Declaration of Independence accuses George III of a 'long train of abuses' amounting to tyranny. The Constitution's separation of powers, checks and balances, and Bill of Rights were all designed to prevent tyranny. The Second Amendment's right to bear arms was partly justified as a defense against government tyranny. The Greek word shaped the architecture of American government.

Modern usage preserves the Greek trajectory. Tyranny is always bad. A tyrant is always oppressive. The word has no neutral register. But history complicates the picture — some authoritarian governments have been economically successful (Singapore under Lee Kuan Yew is a commonly cited example). The word 'tyranny' closes the debate before it starts. If you call a government tyrannical, you have already judged it.