>>512829159
That entirely depends on who lands here. If they're like Europeans but not plagued by pathological altruism, we'll see a golden era when they annihilate the brown hoards or put them to the slave caste as is natural.
If they are some kind of demonic host, it'll be a false golden era that they plan on destroying us with.
If they are some kind of organic neighbor, given that they advanced in technology to the point of space travel, they will probably be disgusted by a lot of the primitive habits are so-called developed society has. That could arrange in solutions. Pogroms or some kind of proposed solution that they let us choose.
If they're like the Beta, then they will not be empathetic at all, and may see this planet as a mere cache of resources to be processed.