The entire ending speech is made of this. Not just the content of it, but its context: it was written before World War II really got underway, and when the film was released (in Britain, at least), Britain stood alone against Germany in Europe's darkest hour. What followed truly was a uniting of free peoples/democracies from all around the world, fighting for the liberty of all (most notably, including their enemies—the German and Japanese people) and a better world for all. And they succeeded. Then comes the formation of the United Nations and NATO, along with the Cold War that never became World War III like it would have at any previous point in history. Today, it's far from the perfect world Charlie Chaplin envisions in the speech, but for such a short span of time in a world history that never even came close in its thousands of years, today's world has come incredibly far in that dream, in a way that would probably bring a happy tear to Chaplin's eye.