system
A chat on subreddit /r/me_irl
human
in an apartement complex there needs to be a central authority, 

i live in an apartment complex where everyone owns their own apartment

if there is some kind of problem between two people they work it out between themselves and if there's a problem in a shared space the home owners association works it out.
gpt
That only works as long as all parties are willing to work towards a solution and make compromises. If you guys van do that, more power to you. My uncle had some problematic tennants in his block, the kind that would be removed by any reasonable landlord, but since they own their apartements there's little there can be done.