It is through the party system that we keep all of the politics in each party united. There are third parties coming out all the time saying the Democrats and Republicans are the same, but they are not successful against the two-party system. The two parties are pretty involved down to the grass roots. Democracy is very unorganized. It's not an authoritative model where one person has the say.
Democracy bubbles up from the bottom.
If there is some instability, that's democracy. What has to be done is to manage that instability in a governmental framework that makes it all peaceful. In this country, when one candidate wins the presidency, his predecessor goes out and the new person comes in. This makes for a peaceful transition. You have to deal within a framework that channels ideas in a peaceful manner.