The only name they knew was that of Peter Wiggin, the Hegemon of Earth; the only news that came was news of peace, of prosperity, of great ships leaving the littoral of Earth’s solar system, passing the comet shield and filling up the bugger worlds.
There are no more uses of "prosperity" in the book.
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We are hoping for peace and prosperity.
...during a former period of prosperity when its possessor was being paid $30 per week.