The United States has never been a perfect nation. For almost 250 years, we've had a dream – an ideal of equality and freedom under God. And even though we have never really lived up to that, the dream has not only remained alive, but has inspired others around the world. Some were people who left everything they knew and came here, hoping to build a freer life with more opportunity. Some were nations who changed from within to create their own just and enlightened societies.