Political revolutions are significant changes in political power or organizational structures that occur when the population rises against the government. These revolutions often aim to replace existing political systems with new ones, driven by widespread dissatisfaction with leadership, social inequality, or lack of rights. Examples include the American Revolution and the French Revolution. Revolutions can lead to the establishment of new governments, changes in laws, and shifts in societal norms. They may be peaceful or violent, and their outcomes can vary widely, sometimes resulting in democracy, while other times leading to authoritarian regimes. The Russian Revolution is another notable example.