It doesn't matter if it comes from the past, the Bible, Lord of the Rings or utopian literature. Just discuss the model! It's mostly fiction anyway.
I very much prefer people who base their political beliefs based on empirics about the real world compared to people who just base their political beliefs on made-up fantasy. I don't think there a good reason to treat both the same.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.