The establishment of the National Assembly during the French Revolution was significant as it marked a crucial step toward representative democracy in France. Formed by the Third Estate in 1789, the Assembly declared itself the legitimate voice of the people and made pivotal decisions regarding governance, including the adoption of the Declaration of the Rights of Man and of the Citizen. This act symbolized the rejection of feudalism and the absolute monarchy, laying the groundwork for future democratic principles and the idea of national sovereignty, which influenced revolutions and democratic movements worldwide.