Earlier in the second season, Lelouch pulls off a Moment of Awesome by exploiting this trope.Later, he causes changes in the empire itself, and in the end helps make the world a better place for almost everyone, at the cost of his life and reputation, while passing on the torch of Zero to Suzaku. Lelouch's ideals were to fight against injustice and tyranny caused largely by the Britannian Empire. Luffy's human (though we use that loosely) crew fighting to protect Fishman Island causes that idea to blow up in their faces. As it turns out, you can kill an idea, if you do it with a contrary one.
Gold Roger manages to start the Golden Age of Piracy.
