system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] did humans of Middle-earth separately evolve to have light skin and dark skin or were they all just instantly created as they are?

If they were just created as they are , and evolution based on the climate of their lands was not the reason , why are the northerners light skinned and the southerners like the Haradrim have darker skin?
gpt
Both, probably. They were created as they were, and their descendants continued to evolve. Middle Earth is supposedly our own Earth, at an earlier stage of development, when the geometry of space-time was a little different and magic, angels, demons etc still lingered, but it totally has scientifically describable physical reality, and you could create complex machinery there.

Edit: Edited some stuff for pedantic reasons.