I believe that if we shut down the power of the federal government, which is pushing dirvesity (in America), the result will be that people will naturally segregate and live among their own, within America.
The economic forces (multinational corporations) that push people together, artificially, must be destroyed, and natural order will maintain itself to an extent. I do not believe things must be completely segregated, but I believe given free choice, people will pretty much choose to associate with people who resemble themselves and it will somewhat occur naturally.