Fun fact: almost everybody are dead wrong about David vs Goliath.
David was a seasoned soldier armed with the bronze age equivalent of a 9mm pistol, while Goliath was a huge dude with a club.
The only way Goliath could have had any chance would be if David started the fight in the Goldilocks zone of "within melee range but not so close that the relative size of Goliath and his weapon becomes a disadvantage"