This ninth volume is "Family Matters".
This was the last issue of the series published in comic book form. Subsequent chapters in Gonick's ambitious chronicle were publishe in trade paperback form.
See also:
SRUCC: Cartoon History of the Universe Series
Comixjoint: The Cartoon History of the Universe Series
Comixjoint: The Cartoon History of the Universe #9
Grand Comics Database: The Cartoon History of the Universe #9
Don Markstein's Toonopedia™: The Cartoon History of the Universe
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