that is Alliance and Horde.
forget goblins they came into the game late(WoW).
Alliance had gnomes which made them way advanced in technology wise compared to horde. just look at travel. e.g deeprum tram, skyships vs a trampy zeppelin.
if 100 chimpanzees had a fight against 100 humans, even in the jungle. humans would win because a machine gun and fighter jets along with strategic intelligence would be way to much for the primitive chimpanzees.
the alliance vs horde arc that continues until today would never of been an issue because the alliance would of wiped out the horde long ago had they really been at war.