"Political violence rips apart several towns in southwest Texas. A far-right militia plots to kidnap the governor of Michigan and try her for treason. An armed mob of Trump supporters and conspiracy theorists storms the U.S. Capitol. Are these isolated incidents? Or is this the start of something bigger? Barbara F. Walter has spent her career studying civil conflict in places like Iraq and Sri Lanka, but now she has become increasingly worried about her own country. Perhaps surprisingly, both autocracies and healthy democracies are largely immune from civil war; it's the countries in the middle ground that are most vulnerable. And this is where more and more countries, including the United States, are finding themselves today"--