In September of 2025 Marjorie Taylor Greene called for a national divorce arguing that Red and Blue states had so little in common it was time for them to part company.  She isn’t alone. There are secession movements on both the right and the left as polarization in the country is on the rise. But what would that entail? In his book The Disunited States Ryan D. Griffiths looks at how secession has played out in other countries and what it might look like in the United States.