Bc it tells what the majority of the people want someone votes for who they think would be better and then they count the votes and whoever has the most wins.
There were countless events big and small that led to the beginning of organized government, but they all came from a need to delegate tasks to certain people.
This is not a school question, is it? You are trivializing genocide. The way to do what you are asking, though, is to become informed and do well enough in school so that you can become a political scientist of historian, so that you can have a real voice and be heard and influence people.
Start by googling the Armenian genocide. No, start by trying to answer why it's wrong to say what you just said. Look the word up.