When I think about establishing ethnostates my first thought is the conservative principle that reform should repair, not tear down. And so I don't think of anti-federalist secessions, ethnostates will eventually need at least a light federalism for protection from big marauding imperial-projecting countries like Russia and China.
My conservative instincts see a constitutionally sanctioned independence and separation for the states. A federalism of the American variety with strong states rights can work for future ethnostates. The Constitution certainly gives the states independence and freedom, especially with the Tenth Amendment, which means that radical solutions such as revolution or secession are not necessary.
First of all it's the people that need conserving, the biological origin of social behavior tells us that the culture and the laws are basically there to aid in the successful survival and reproduction of the people living under the culture and the laws.
The
biological origin of social behavior and real human nature, which is
genetically kin and ethnic centered, leads naturally to regionalism,
localism, and eventually an ethnopluralism
of ethnostates for all ethnic groups or races, black, brown, red,
white, or yellow.