The movie, 2001: A Space Odyssey shows a Monolith uplifting apes by teaching them to use bones as tools. One tribe of apes use the tools as clubs to kill another tribe to gain access to a watering hole.
kill all humans for being too warlike. Thus implying that the Monoliths select out overly aggressive species and favor more peaceful civilizations.
Wouldn't the original monolith have known that the apes it uplifted just invented war?
I don't think the answer is in the books (and certainly not in the movies), so I am looking for answers from interviews or comments by the author, Arthur C. Clarke.