Where some possess much, and the others nothing, there may arise an extreme democracy, or a pure oligarchy; or a tyranny may grow out of either extreme.

Aristotle (384-322 BC) Greek philosopher
Politics [Πολιτικά], Book 4, ch. 11 / 1296a.1-3 [tr. Jowett (1885)]
    (Source)

Alternate translations:

• "When some possess too much, and others nothing at all, the government must either be in the hands of the meanest rabble or else a pure oligarchy; or, from the excesses of both, a tyranny." [tr. Ellis (1912)]
• "Where some own a very great deal of property and others none there comes about either an extreme democracy or an unmixed oligarchy, or a tyranny may result from both of the two extremes." [tr. Rackham (1932)]
• "Where some possess very many things and others nothing, either rule of the people in its extreme form must come into being, or unmixed oligarchy, or -- as a result of both of these excesses -- tyranny." [tr. Reeve (2007)]
• "Where some people are very wealthy and others have nothing, the result will be either extreme democracy or absolute oligarchy, or despotism will come from either of those excesses."