Read this passage from "The American Dream." Through our scientific genius we have made of this world a neighborhood; now through our moral and spiritual development we must make of It a brotherhood. In a real sense, we must all learn to live together as brothers, or we will all perish together as fools. We must come to see that no individual can live alone: no nation can live alone. We must all live together; we must all be concerned about each other. Which phrase best summarizes the speaker’s claim that Americans must come together as equals?