The Tennis Court Oath foretold the coming of the French Revolution by signaling a dramatic shift in political power and the rise of popular sovereignty. It declared that the Third Estate, representing the common people, would no longer accept being marginalized and would work together until France had a new constitution. This oath challenged the authority of King Louis XVI and the traditional Estates-General system, asserting the idea that political authority derived from the nation and its people, not the monarchy. It was a clear act of defiance against royal power and a promise to establish a government based on constitutional law. This event led directly to revolutionary activities including the formation of the National Assembly, the Storming of the Bastille, and eventually the execution of the king and the establishment of a republic in France.