A revolution (from the Latin revolutio, "a turnaround") is a significant change that usually occurs in a short period of time. Revolutions have happened throughout human history and vary widely in terms of methods, duration, motivating ideology, and the number of participating revolutionaries. Their results include major changes in culture, economy, and sociopolitical institutions.
Scholarly debates about what does and does not constitute a revolution center around 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.
