There is a growing interest in American secession. In February 2023, Marjorie Taylor Greene tweeted that "We need to separate by red states and blue states." Recent movements like Yes California have called for a national divorce along political lines. A 2023 Axios poll shows that 20 percent of Americans favor a national divorce. These trends show a sincere interest in American secession, and they will likely increase in the aftermath of the 2024 Presidential election.

Proponents of secession make three arguments: the two sides have irreconcilable differences; secession is a legal right; and smaller political units are better. Through interviews with secessionist advocates in America, Ryan Griffiths explores the case for why Red America and Blue America should split up.

But as The Disunited States shows, secession is the wrong solution to the problem of polarization. Red and Blue America are not neatly sorted and geographically concentrated. Splitting the two parts would require a dangerous unmixing of the population, one that could spiral into violence and state collapse. Drawing on his expertise on secessionism worldwide, he shows how the process has played out internationally—and usually disastrously. Ultimately, this book will disabuse listeners of the belief that secession will fix America's problems.