If you’re talking about the US, a constitutional bicameral presidential republic, with three branches and a judiciary of your peers, was first done in the US. In fact most modern constitutions are inspired by the American constitution.
Republic - Greece and Rome.
Democracy - Greece
Judiciary & Jury - Saxon/England
Common Law Legal System - Saxon/England
Principles of the Enlightenment that inspired the Founding Fathers - Germany, France, Italy and England
More countries have used the Canadian constitution than the US as their framework.
Yes, amazingly, literally everything is inspired and influenced by things in the past, since the US founders were influenced largely by European cultures they were influenced by Europe. But of course, all those European cultures were even more significantly influenced by Levant cultures. Why learn European history that was just savages a few thousand years ago when you could learn Levant cultures?
More countries have used the Canadian constitution than the US as their framework.
Yes, amazingly, literally everything is inspired and influenced by things in the past, since the US founders were influenced largely by European cultures they were influenced by Europe. But of course, all those European cultures were even more significantly influenced by Levant cultures. Why learn European history that was just savages a few thousand years ago when you could learn Levant cultures?