Final answer:
Oligarchy is a small, elite group holding power; autocratic leaders decide independently; risks of tyranny and oligarchy were debated by Plato and Aristotle.
Explanation:
Oligarchy is a form of government where power is held by a small, elite group, not necessarily based on noble ancestry but on factors like military might or economic power. In contrast, autocratic leaders make decisions on their own, utilizing their title or status to set the group's agenda. Plato and Aristotle discussed the risks of a tyranny, where a ruler works solely for personal benefit, and an oligarchy, ruled by a few in service of their own advantage.
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