What influential pamphlet condemned the system of monarchy?

Common Sense is the right answer, that common sense condemn the system of Monarchy.

Thomas Paine wrote the "Common Sense pamphlet" in 1775-76, by which he advocated independence for the thirteen colonies of the United States from the British rule. Paine through his Pamphlet encouraged the common people of these thirteen colonies to fight against the Egalitarian government. This pamphlet became most significant in the Independence of the thirteen colonies of United States and in the formation of Democratic Republic. The main theme of the Pamphlet that Thomas Paine wrote was that the Monarchy was a defective form of administration.