In political theory, the term "revolution" signifies a fundamental and often rapid change in political power or organizational structures, typically initiated by a significant segment of the population. Revolutions aim to overthrow existing regimes or systems deemed unjust, ushering in new ideologies and governance. They can take various forms, including armed insurrections or peaceful protests, and often arise from social inequalities, economic challenges, or political oppression. The outcomes of revolutions can redefine national identity and impact global politics by inspiring similar movements or altering geopolitical alliances.