Any sort of democratic system presupposes the existence of internal divisions and conflicts within society. Otherwise, why would you need it? If everyone agreed with each other, then politics as we currently understand it wouldn't exist; there would just be something which we would perceive as a "benign dictatorship".
You are more right than you know.
The Founding Fathers did not want political parties, we were supposed to be one big, happy, family. But infighting broke out quickly, between Hamilton and Jefferson.
This evolved into the 2 party system we have.