Geez, where to begin...
A person's natural state is to be born with total personal freedom to do anything, and to bear the consequences of those actions and decisions.
The only thing that government can do is limit those personal freedoms through restrictions. This is supposedly done "for our own good" or "for the greater good". These goals are defined by people who seek the power to define the goals. These people must be limited by something (the Constitution) or they will continue to restrict our freedom and add to their own power.
No, there aren't liberals and conservatives in America - there are Socialists and Constitutionalists.