Goku was the weakest member of some race of superpowered genocidal psychopaths and mercenaries, meant to clean off one of the less technologically advanced planets in the Universe from its even physically/Ki sensitive weaker population and make it suitable to be sold to the highest bidder because even the weakest Saiyan would be a juggernaut among us.
Race that was itself doomed to fail and tragically fell in an eponymous disgrace, because some gods deemed that their wickedness and barbary posed an even greater threat to the Universe than the psychopathic sadistic despot who somehow enslaved them for a start, and reportedly reduced the once-innumerable living population of the Universe to barely 26 inhabited planets, while others couldn't simply stand their ruler's face.
The lasting survivors who haven't winded up killing each other for good winded up stranded on Earth, forced to blend in with Earthlings, marrying up Human wives and sire half-blood children who were meant to be even potentially stronger than their full-blooded fathers and forefathers. While one grew up believing being a human, the others be slowly begun to be swayed by their adopted home and foster some humanity-- and the more human they become, the greater their strength grew both physically and spiritually.
And in the middle of all of that, even physically stronger characters confronts them. Sometimes they barely live the day, other times not but figure a way out because of luck or a literal deus-ex-machina plot armor.
Dragon Ball has never been about a misquotation of Charles Darwin's works. That's how you Americans perceive it.
