Jimmy, our own Government refers to our form of government as a democracy.
Here is an example:
http://usinfo.state.gov/products/pubs/whatsdem/whatdm2.htmWhat I meant was that we have very little direct power. We can shout as loud and as long as we can, but our elected officials can do what they please. Our only recourse is to vote them out of office after the fact. What our Founders wanted was power and control and they knew that they had to hide that from the masses that fought the American Revolution. The American Revolution was a war over power and money and the Declaration of Independence was merely a tool to justify starting the war.
You are right, a person's race, like one's gender, is not a choice. Yet, in the past millions of white Americans use race as a basis of hate and discrimination towards African Americans. That hatred was based on skin colour; the only real difference between Blacks and Whites. Blacks only wanted the same rights and privileges that Whites enjoyed and it took laws aimed at protection of a minority to give them those rights.