And, for this reason, those who are eminent in virtue usually do not stir up insurrections, always being a minority. Such are the beginnings and causes of the disturbances and revolutions to which every form of government is liable.
 Aristotle, Politics (4th century BC). copy citation

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Author Aristotle
Source Politics
Topic disturbance revolution
Date 4th century BC
Language English
Reference
Note Translated by Benjamin Jowett
Weblink http://classics.mit.edu/Aristotle/politics.html

Context

“Revolutions also break out when opposite parties, e.g., the rich and the people, are equally balanced, and there is little or no middle class; for, if either party were manifestly superior, the other would not risk an attack upon them. And, for this reason, those who are eminent in virtue usually do not stir up insurrections, always being a minority. Such are the beginnings and causes of the disturbances and revolutions to which every form of government is liable. Revolutions are effected in two ways, by force and by fraud. Force may be applied either at the time of making the revolution or afterwards. Fraud, again, is of two kinds; for (1) sometimes the citizens are deceived into acquiescing in a change of government, and afterwards they are held in subjection against their will.” source