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In political science, a revolution (Latin: revolutio, "a turn around") is a fundamental and relatively sudden change in political power and political organization which occurs when the population revolts against the government, typically due to perceived oppression (political, social, economic). In book V of the Politics, the Ancient Greek philosopher Aristotle (384–322 BC) described two types of political revolution:
  1. Complete change from one constitution to another
  2. Modification of an existing constitution.
Revolutions have occurred through human history and vary widely in terms of methods, duration and motivating ideology. Their results include major changes in culture, economy and socio-political institutions, usually in response to perceived overwhelming autocracy or plutocracy.

Scholarly debates about what does and does not constitute a revolution center on several issues. Early studies of revolutions primarily analyzed events in European history from a psychological perspective, but more modern examinations include global events and incorporate perspectives from several social sciences, including sociology and political science. Several generations of scholarly thought on revolutions have generated many competing theories and contributed much to the current understanding of this complex phenomenon.

Notable revolutions during later centuries include the creation of the United States through the American Revolutionary War (1775-1783), the French Revolution (1789-1799), the 1848 European Revolutions, the Russian Revolution in 1917, the Chinese Revolution of the 1940s, and the Cuban Revolution in 1959.

Etymology

The word "revolucion" is known in French from the 13th century, and "revolution" in English by the late fourteenth century, with regard to the revolving motion of celestial bodies. "Revolution" in the sense of representing abrupt change in a social order is attested by at least 1450. Political usage of the term had been well established by 1688 in the description of the replacement of James II with William III. This incident was termed the "Glorious Revolution".

Types