The reason our country looks the way it does is through social engineering that distinctly benefits suburban communities, exurban communities, and often white residents. And we are socially engineered in such a way as to, often unconsciously and unintentionally, but sometimes intentionally, perpetuate this divisive inequality.

I had been hearing on-the-ground buzz that white folks were moving to places like Bend, Oregon, and Coeur d'Alene, Idaho, and St. George, Utah. That led me to discover through census data that these towns were already extremely white and they were becoming, in most cases, even whiter. Statistics could only tell me so much; in order to get to the spirit and essence of it, I had to immerse myself.

There is tremendous long-term harm when Americans accept ethnic and class balkanization as a de facto fixture of American life. I think that impoverishes our understanding of each other.

When well-qualified, upper middle-class blacks or Latinos or Asians move to predominantly white neighborhoods, there's what's called the tipping point. That tipping point is generally 15 percent; at 15 percent you begin to see white flight.

Of course, there isn't really a black population in Idaho or Utah.

Problem with segregation isn't that people can't live in peaceful harmony singing "Kumbaya" - although that wouldn't be bad. The problem is that many of these Whitopian communities are taking state, local, and federal resources with them.

In the pioneer West Whitopias, immigration tended to be the dominant social and racial issue. In Forsyth County, Georgia, immigration is still an issue, but because you have that complicated history of the Trail of Tears and slavery and Jim Crow, the Whitopia has a different flavor.