I quote from recent WaPo article:
“[There is a] scale that goes from negative 10 to positive 10. Negative 10 is the most authoritarian, so think about North Korea, Saudi Arabia, Bahrain. Positive 10 are the most democratic. This, of course, is where you want to be. This would be Denmark, Switzerland, Canada. The U.S. was a positive 10 for many, many years. It’s no longer a positive 10. And then it has this middle zone between positive 5 and negative 5, which was you had features of both. … scholars found was that this …variable was really predictive of a risk for civil war. That full democracies almost never have civil wars. Full autocracies rarely have civil wars. All of the instability and violence is happening in this middle zone. “
The US is in or near the middle zone.
This idea makes a lot of sense. This appears to be a must read book.