system
Given the following post, respond as if you're commenting on Reddit:
human
[Hunger Games]  Why doesn't Capitol establish colonies in other areas of the world?

If Panem is the last remaining collection of humanity, why not send a few people away to try and found colonies in the other parts of the world?  Surely the remnants of the North American continental plate isn't the last bit of habitable land?
gpt
there really isn't that much arable land and due to a lot of lingering fertility issues related to fallout the population hasn't really expanded enough to justify it.

Further at this point anyone suggesting doing so is looked upon as a potential traitor and in extreme cases could disappear.