Final answer:
Vonnegut described a future society to warn about potential consequences and create a contrast with the present-day society.
Step-by-step explanation:
Vonnegut described a society 120 years in the future in order to provide a warning of what could happen if present-day society does not address a problem. By setting the story in the future, he creates a sharp contrast between the present-day society and the future, emphasizing the potential consequences of not addressing the issues at hand. This future setting also helps to distance the audience from the story, minimizing the risk of offending readers who may be sensitive to the portrayal of current societal problems.
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