system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: where does left/right handedness come from, and what evolutionary imperative made most people right handed?
gpt
It's not so much that there's a benefit to most people being right handed, as it is that there's a benefit to some people being left handed.

I think the going theory is it's to do with fighting. You're at an advantage as a left fighting someone who's use to always fighting righties.