Brazil is probably the country that comes closest to this but no one is singing kumbaya. In fact, they have many unwanted kids living in the streets and there is still a race continuum from black to white. When people of different races interbreed on a large scale there will be a *rainbow* effect as some take after one side of the family and others take after the other. Even within the same family there will be marked racial differences, as a result the Brazilians have developed an elaborate system of catergorizing people by race. Race never goes away no matter how much you try to *blend* people.