There is one thing about this that sort of jumps out at me as an obvious path for humanity that the topsiders have never seemed to pursue. What about the “anthros” that are actually human? We know that some people woke up still themselves, yet the topsiders killed them because they thought that they were infected with a virus, but now they know that there is no virus, so these are quite literally humans that don’t need a suit. What is the product of their reproduction? The lizard colony was eating the eggs that they produced that weren’t lizards, so it is assumed that not all offspring will be the same species, but it would all be mammalian using that pretext as a basis. And there may be a higher probability of human offspring if both sources are human. This whole arc never seems to be studied, but if you wanted to maintain “humanity”, this seems a much more rational way to go about it. Also, we assume that anthro offspring will not turn into monsters when born or they wake up. This is because they are already part of the reality, I assume. This should also be true of anything made from their DNA. If they want to make sure the offspring is human they should be using antro humans as a source for reproductive material. It is also possible that anthros could have “human” children. There is a lot of things here that Aaron never really followed the logic of.