A hundred years ago, people didn’t talk about changing the world — not in the way we speak of it today. In 1912, there weren’t movements for the eradication of poverty or disease, or even an understanding of their scale. Then came Woodrow Wilson’s dream of the League of Nations, Eleanor Roosevelt, and the formation of the United Nations. From there, Gandhi, the civil rights movement, and speeches by President and Robert Kennedy that declared, “We need men who dream of things that never were,” and that spoke of “a new world society.” There was Martin Luther King’s “I have a dream” speech, delivered at the age of 34, and Neil Armstrong walking on the surface of the moon at the age of 38. Their youth brought a feeling of youthfulness to humanity itself, and gave people the sense that nothing is impossible.