system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman] Why didn't the Kryptonians take over a planet with a yellow or blue star earlier?

I know General Zod's whole thing is basically this, but why didn't it happen before?  There's also other yellow stars out there. Why do Kryptonians choose to live on a planet where they have no powers?
gpt
Depending on the continuity, that's exactly what they did. Then they had some disagreements among themselves. Imagine a civil war between an interstellar empire of Supermen. They shocked themselves with their own brutality, and settled on Krypton and *only* Krypton.