Final answer:
The Third Estate members established the National Assembly as a new law-making body in France.
Step-by-step explanation:
The Third Estate members in France tried to establish a new law-making body as a result of the unfair voting process of the old law-making body under the Old Regime's political rules. They carried out the first deliberate act of revolution by voting to create the National Assembly. This act of political rebellion reinforced the sovereignty of the people and marked a significant turning point in the French Revolution.