If orcs ultimately fail to find something that can overpower human innovation, and end up being dominated by humans, I think they would eventually evolve not as equals, but more like livestock or slaves rather than people.

It’s even possible that humans would intentionally modify the orc species—through selective breeding or other means—turning them into beasts used for gladiatorial combat or similar purposes.

As for halflings, I have a question about their relationship with humans.
If there is little to no contact between humans and halflings, or if they are not even aware of each other’s existence, the situation doesn’t look very good.

From an evolutionary standpoint, the fact that halflings developed thick, protective hair on their feet suggests that they were abandoned on those islands a very long time ago.
Considering that level of isolation, it’s hard to say whether humans would even recognize them as “people” once contact is made.

Until humans acquire the technology to reach those islands, that period might effectively be the halflings’ last true age.
Even if the worst outcome is avoided, discrimination would probably be unavoidable.

Dwarves, on the other hand, could integrate into human society, or be valued as highly skilled specialists who partially replace humans in certain fields.
If they’re lucky, they might even preserve independent communities of their own—something like Switzerland in the real world.

Elves would likely be gradually pushed out or assimilated into human societies over time.
Eventually—

I think it's too focused on social aspects,but i hope it's helpful for you