In many cities persons of exceptional energy, taking advantage of some social conflict or class grievance, secured a more or less irregular power in the state. This combination of personality and opportunity has occurred in the United States of America, for example, where men exercising various kinds of informal power are called _bosses_. In Greece they were called _tyrants_. But the tyrant was rather more than a boss; he was recognized as a monarch, and claimed the authority of a monarch. The modern boss, on the other hand, shelters behind legal forms which he has “got hold of” and uses for his own ends. Tyrants were distinguished from kings, who claimed some sort of right, some family priority, for example, to rule. They were supported, perhaps, by the poorer class with a grievance; Peisistratus, for example, who was tyrant of Athens, with two intervals of exile, between 560 and 527 B.C., was supported by the poverty-struck Athenian hillmen. Sometimes, as in Greek Sicily, the tyrant stood for the rich against the poor. When, later on, the Persians began to subjugate the Greek cities of Asia Minor, they set up pro-Persian tyrants. Aristotle, the great philosophical teacher, who was born under the hereditary Macedonian monarchy, and who was for some years tutor to the king’s son, distinguishes in his _Politics_ between kings who ruled by an admitted and inherent right, such as the King of Macedonia, whom he served, and tyrants who ruled without the consent of the governed. As a matter of fact, it is hard to conceive of a tyrant ruling without the consent of many, and the active participation of a substantial number of his subjects; and the devotion and unselfishness of your “true kings” has been known to rouse resentment and questioning. Aristotle was also able to say that while the king ruled for the good of the state, the tyrant ruled for his own good. Upon this point, as in his ability to regard slavery as a natural thing and to consider women unfit for freedom and political rights, Aristotle was in harmony with the trend of events about him.