After someone made the connection between Chewbacca (and subsequent the Ewoks) and the George RR Martin's novella "And Seven Times Never Kill Man," I went back to re-read the story. It became clear that both Georges were metaphorically commenting on the Vietnam War in their depiction of a jungle war, in which the technologically more dominant and more powerful side is defeated by a weaker tribe.
Needless to say, GRRM was vastly, vastly more interesting. Lucas catered to what people want to believe, derived from wishful thinking; and Martin went by his astute observation of history.
What is mind tickling, however, is how Martin's vision based on one particular war panned out in many future wars, in which the military victories of the mighty empire over small insignificant tribes set off an insidious slow incineration from within the empire ... until they too begin to sacrifice their children to the pale god of war Bakkalon.
Martin's predictive power is spectacular.