It hasn't and probably it never will.
It is also philosophically dangerous to equate civilization to good and savagery to evil. After all, we as so called civilized men would be inherently biased in assuming that we represent the positive side of this equation while nature's savages, or that which is the antitheses of what's civilized, represents or equates evil.
Binary comparisons often lack the subtlety to portray the complexity of life and its myriad shades of gray.
At best we could say that evidence suggests civilization seems a more desirable option than savagery.
