On page 50 of Eclipse Phase, it notes that 95% of humanity inhabits artificially created morphs. Presumably, the remaining 5% are flats, meaning there are about 25 million flats. This number is allows for them to be by far the largest group in the Jovian Republic and still leaves enough to be a substantial minority in the LLA. This is a not inconsiderable number, but given that most of those would be in the Jovian Republic and the rest in the LLA or Horeb, it would be quite rare to see a Flat on Mars. For one thing, Flats cost the same as Splicers so non-bioconservatives would rather upgrade if they can, and bioconservatives would rather live in a country friendly to their cause like the Republic or the LLA. However, we know there are some Flats in the Planetary Consortium because it is specifically stated that the Consortium has Zeroes and otherwise mistreats ordinary humans. Actually, I imagine Flats are unlikely to bother with mesh implants. Fundamentally, an ecto does virtually everything Mesh implants do, and is cheaper besides. Cortical Stacks for Flats might be common outside the Jovian Republic, but they would be almost unheard of within it. Restrictions on uploading make them of limited utility, and sudden death is very unlikely within the rigidly controlled Jovian Colonies, so there is little need for them.

Certanly we are however talking about the solar system and its inhabitants. However from a loophole point of view, page 50 doesn't say that the numbers are the solar system remaining inhabitants (so its open for assumption), Universe is quite vast. But it might still qualify to answers the Ops question since it are about the the EP universe (thus not necessaries limited to one mere solarsystem) So is there 25 million flats in the solarsystem, or in the universe? Does surviving flats "trapped" on Earth count? Does any eventual flats in TITAN captivity count?

The Page 50 reference is too vague to take any numbers at all from. The exact quote is; 'However, slightly less than four percent of the remaining population inhabit flats or splicer morphs without basic implants and also lack access to ectos and other basic technologies.' The important part of that quote is the 'without basic implants'. It is possible to be a Flat morph with mesh inserts. It is also possible for Flats to be artificial. Although I am unsure whether or not there are other figures that will give a more accurate number, this particular one tells us nothing about the total population of Flats in the solar system.

It's actually quite less than that. Page 50 notes that while 95% of humanity inhabits artificially-created morphs, less than 4% inhabit flats and splicers. First off, that means that slightly more than 1% of the population inhabits no morph at all. Secondly, it means that the flat population is probably startlingly low, since it shares that 4% cut of the pie with splicers. I'd guess it smaller than the splicer population, so you're probably looking at ~1-2% of humanity inhabiting flats.[/quote] No, because mesh implants come basic with all splicers. Splicers without mesh implants would be very rare, since there is almost no reason to remove them. The percent of that 4% without implants that are splicers is a tiny minority, and almost all of them are flats. Plus, Flats can exist with mesh implants, so they are part of the remaining 1%. So that makes about 4.4% (22 million) of humanity as flats. It's impossible for the number of Flats to be any lower than this; the backgrounds specify that Flats are reasonably common morphs in the Jovian Republic, Luna and Mars, which is utterly impossible if they are only 1-2% of the population. While Flats can be artifically created, there really isn't any significant market for them. Non-bioconservatives would rather have splicers, which cost the same, and bioconservatives would be disgusted at the concept of "manufactured" humans.