system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] Tell me more about this "post-atomic horror" society that Q re-enacted.
gpt
It was apparently localized to only certain areas of the world that were slower in redeveloping after WWIII. For instance, Q's society was based on one from the year 2079, whereas First Contact had already happened by 2063. 

Montana seemed like a fine place after the war and during First Contact (in 2063). Wherever Q's court was, it was in a part of the world that was very isolated and possibly didn't receive news of First Contact until many years later. Given the nature of the court and it's appearance, it was possible the court was in the far east (The Eastern Coalition) and that they had purposely isolated themselves from the rest of the world (like North Korea.)