A very informative book that outlines in great detail the policies that caused past empires/governments to fail: tyrannical dictators, expanding government, higher taxes, corrupt officials, distribution of wealth, crumbling economies. It's all covered.
If you respect and value the Constitution, believe in smaller government, less taxes, a balanced budget and more freedom for everyday citizens, this book is a "must read".
But if you think the Constitution is outdated and needs to be repealed or revised, believe in a large centralized government that controls all aspects of peoples' daily lives, higher taxes, and less freedom in exchange for security provided by the government, aka socialism, communism, progressivism or whatever it's called these days, you will absolutely hate this book because it explains why your way of thinking will always lead to failure.
Browsing through the reviews, it's obvious that some of them were left by people who advocate socialism/communism and thus disagree with or dispute most (if not all) of what's in the book. They're basically trying to discredit the author by giving the book a low rating. Some will even say that they actually delved deeply into the facts and that the author has distorted history. But facts are facts and cannot be ignored. It's a fact that these past empires crumbled or collapsed because of the same policies that the current administration in America is trying to implement: Larger government, increased spending, higher taxes, etc.
It's really quite simple: Fewer jobs = more people on welfare = increased government spending = higher taxes = strain on economy = fewer jobs.