Which all made for a picture of those first four millennia that was as clear as it was bleak. But change would come hard to a society like that one. What was most interesting to Ty was what had begun to go on within that society when they’d punched the spoil adit to the surface and begun to expand their underground domain. Their day-to-day lives would not have changed much, but they’d have had at least the abstract possibility that their civilization might expand, that more people might be able to breed.