'Yellow Submarine' (1968): All You Need Is Love
You gotta give credit to the Blue Meanies for one thing: They get straight to the point. They didn't give their society a PR-friendly name, like, "The Democratic Union of Cornflower-Hued Personages." They're blue and mean—no need to sugarcoat it. Their WMD was a glove called "Glove." They despise beauty, happiness, song, and goodness. So why make an excuse to obliterate beautiful, happy Pepperland when its very goodness is reason enough?
"Pepperland is a tickle of joy on the blue belly of the universe," the chief Blue Meanie says. "It must be scratched."
But all the blueness of the universe couldn't squelch the song of the film's psychedelic Beatles, and Pepperland just needed a little song from them to bring back its color and, um, animate it once again. The music—and, by extension, love—was so powerful that even the Meanies themselves began to sprout flowers.
Cute piece of fiction, right? Love might conquer Glove, a cynic might say, but it can't help the world in any meaningful way. Yeah, tell that to Jesus, Gandhi, or Martin Luther King, Jr. Wars may come and go, but real change is made through love.