The American Revolution presented a high level of popular politics participation under the Confederation years. This moment marked the option for the absolute doctrine of the separation of powers as a response against the failure of the balanced constitution theory and the incapacity of the British Parliament to protect the colonies civil liberties. However, the fear of popular engagement made the American elites lead a centralization of power that could be able to control the popular local democracy. The Constitution of the United States and its checks and balances system were born as a result of that conservative process. The constitutional structure protected the government of the people direct action and influence, creating a separated dimension to the politics forces game. The study of the concepts of this era and the meanings they were used, particularly, the Jefferson s, Madison s and Hamilton s conception concerning of the separation of powers doctrine helps to understand how the Constitution ruptured the spirit of the American Revolution, based on the active citizenship.