Did anyone else think the baby-eaters were created by the superhappies to demonstrate their point to the humans? The way the humans looked thought of the baby-eaters clearly paralleled how the superhappies viewed the humans. The end of chapter 3 really drove the point home:
They're a lot like our own children, really.
"- they somewhat resemble the earlier life stages of our own kind." [said Lady 3rd]
It seems to me that the superhappies had observed the humans beforehand and found their acceptance of pain abhorrent. They then fabricated the baby...
I did the thing!