@kaiservenom - generally, homogeneity. But freedom means there will be some mixing. It would be a trickle. And the reason for the mixing would be falling in love - and for non-romantic immigration, a personal alignment with broader cultural values.

Race and racism would largely be a non-issue. Those who choose to live apart from their race or ethnic tribe, will have to accept that they must prove themselves. People used to do this all the time. It's fine - very doable.