Blacks have the black ghettos in the cities.
Browns have their barrios.
Indians have their reservations.
All three groups are harmed more than helped by being cloistered and somewhat separated from the general population.
The only thing that could help the Indians is to end the reservation concept and bring them out into mainstream America.
But that's never going to happen.
Browns are actually indians that migrated north
Blacks and Indians are all from the recent stone age