As a milk white guy I realised moving to Australia was against two million years of evolution, bearly surviving walking to the mailbox without getting sunburnt.
How did early settlers protect against getting turned into lobsters before noon? Was there some kind of a trick, aside from wearing a sombrero, that has been lost some sunscreen became widely available?
Another relevant answer(edit: from u/rioabajo).
In short, human skin depigmentation occurred within the last 10k years, so this is not a question of 2 million years of evolution. Perhaps a minor quibble but important to understanding human (pre)history.
Edit: the study linked in that comment is about locations in southern Europe, and depigmentation had occurred earlier further north. But that’s a minor detail, the important point is that Homo sapiens migration to Northern Europe didn’t happen before something like 40k ybp. With depigmentation we’re talking about a relatively rapid (10-40ky) and repeatable change in response to environmental conditions, not the divergence of species over millions of years.