GD
You are factually incorrect.
Pure Democracy is a relativity recent invention and it is not common place throughout the world.
In addition the United States of America is not a pure democracy rather it a Republic of States.
The reason being was the Founders of this country feared what they called the “tyranny of the majority”.
In other words they feared that the majority would seek to force the minority to live on their terms.
As such the prescribed limited government where the true power lies not with the Federal Government rather with the states.