Final answer:
The answer cannot be definitively given without knowing the specific story being referenced. The changes mentioned are common in dystopian or utopian literature, including people not aging, everyone being happy, no war or disease, and the American population being capped. The correct answer will depend on the story's context.
Step-by-step explanation:
Without the context of the specific story from which these options are derived, it isn't possible to definitively identify which change is NOT part of the world depicted within it. However, these options generally represent significant societal changes you might find in dystopian or utopian literature. The changes include people no longer aging, constant happiness, absence of war and disease, and the American population being capped at 40 million. Each story may formulate a distinct vision of a changed world, so you will have to refer to the story in question to determine which of these changes does not apply.
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