Federalist Paper Number 51 is about checks and balances between the different branches of government: the legislative, executive and judicial. These checks and balances were designed to make sure one branch wasn't abusing its power over the people or over the other branches. Making a foundation for the government powers is "essential to the preservation of liberty." (Quote from the document) The checks and balances were also made because once the government controls the people, they need to be controlled themselves.
The issue of checks and balances was a good thing that happened in our government. Had they not been made, it was likely that the different branches of government could've abused their power. It would've given them the opportunity to do things more in favor of their own beliefs. Without checks and balances, it wouldn't have been fair.
