The tendency of royalty to exercise more and more absolute power could be challenged in times of turmoil, civil wars and the reigns of minor kings. The dispute took a more pronounced character on the occasion of the diffusion of the philosophy of enlightenment and of the values that it carried: government of reason, separation of powers, individual liberties. The French Revolution led to the establishment of a French constitutional monarchy. However, the different formulas experienced failure in 1792, 1830 and 1848, which ended the French monarchy.