system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Could allergies eventually by phased out by evolution / natural selection? Or do genetics play no part?

A question that was keeping me up pondering at 2am last night.
gpt
I suppose at least theoretically they could, but the last few years have seen allergy rates in the western world shoot *up*.  The main theories for this are due to lack of exposure to allergens at a young age, leading to an immune system that overreacts to every foreign body that it detects.

Allergies are a side-effect of having the (super complex but highly effective) immune system that we do - this means that they are unlikely to go anywhere soon, because it would involve a fundamental change in the mechanisms of how we deal with pathogens.