Half a century ago, Pres. Lyndon Johnson teamed up with the ad men of New York to produce one of the most famous – and controversial – political ads of all time.
A young girl lackadaisically plucks the petals off a flower, counting as she goes. But soon, her count is interrupted by a mission-control style countdown: when it ends, a mushroom cloud envelops the screen. "These are the stakes," Johnson intones. "To make a world in which all of God's children can live, or to go into the dark. We must either love each other, or we must die."