An analysis of how populations are growing and shifting around the US, with a focus on the policital consequences. He splits the country into four main areas: Coastal Megalopolises, Interior Boomtowns, Rust Belt, and Static Cities. "The bad news for them is that the Coastal Megalopolises grew only 4% in 2000-06, while the nation grew 6%. [...] You see an entirely different picture in the 16 metro areas I call the Interior Boomtowns (none touches the Atlantic or Pacific coasts). Their population has grown 18% in six years."