I wish I'd read this one first before some of the other Atheus-related subs. This gives me a better sense of things.
Giving this a 3.5/5, but only because it's light on details. Hopefully many of those details will be filled out in other subs. (I always struggle with figuring out how much to put in one sub and when to split it out into others, knowing I risk a lower score on the individual ones when I do.)
Looking forward to reading more, including catching up on the history.