The Federalist 51 lays out the “federal principle”. It is the notion that a "compound republic" is the best protection against reproaches by any set of would-be rulers and/or a factious majority of the people. The purpose of Federalist 51 is to "form a more correct judgment of the principles and structure of the government planned by the Constitutional Convention". In the document, it is informing the reader of the safeguards and the separate branches of government, and to protect the rights of the people. Since the beginning of time, we have always had a right to our natural rights. They should never be taken away from us. And when they are taken away from us, someone needs to be punished for taking them away from us.
One of the difficulties of Federalist 51 is the argument about factions or no factions. I don’t think that Madison ever meant to fully get rid of factions. Madison just wanted to make sure that no one could take away another person's rights. The constitution and the declaration of independence guarantees certain rights for anyone, so that even if there are factions they all have to follow and abide by the same laws. Some difficulties, however, and some additional expense would attend the execution of it. Some deviations, therefore, from the principle must be admitted. In the constitution of the judiciary department in particular, it might be inexpedient to insist rigorously on the principle: first, because peculiar qualifications being essential in the members, the primary consideration ought to be to select that mode of choice which best secures these qualifications; secondly, because the permanent tenure by which the appointments are held in that department, must soon destroy all sense of dependence on the authority conferring them.
Madison famously points that "if men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government.” In so doing he clearly clarifies the nature of the problem -that in order to govern a government must secure the consent of the people to do so, and then prevent the potential of abusing the people by constraining itself against the nature of man, which is to follow his own ambition. This is the paradox Madison mentioned in the article.
The primary control is also very important matter in this article. It states that the people of the country has the right to vote in elections every four years to determine who will be in government and who will be in charge for the next four years. The primary control is government’s “dependence on the people”, which is provided by, the consent of the people to be governed. A dependence on the people is, no doubt, the primary control on the government; but experience has taught mankind the necessity of auxiliary precautions” (Federalist 51). As a country, we do need a system of organization. Which for us is the Government. The Government is there to keep this country organized and from falling down.
Auxiliary Precautions is the structure of the government. It controls the internal checks and balances. “In framing a government which is to be administered by men over men, the great difficulty lies in this: you must first enable the government to control the governed; and in the next place oblige it to control itself. We as a republican country have put our faith and trust that the government will know what to do with their powers. And enforce the separation of powers.