Perhaps you don’t understand what it means.
So you're telling me that if you replace the current population with another with totally different ideals the culture will remain the same?
If you think thats true you're a total fucken retard.
Now dear idiot, our ideals and culture has change much even in my lifetime. In the history of our nation, we have had many waves of immigration, from Ireland, Eastern Europe, Germany, smaller ones from China and Japan, a steady trickle from the Philippines. And each has had a positive effect for our nation. We expanded our nation by the Mexican-American War, and a great many people of Mexican ancestory were included in our nation, regardless of their wishes. Again, a positive result.
And then there is the simple maturation of our nation.
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness."
Yet, after we won the Revolutionary War, these words were only true for white male property owners over 21. The history of our nation is a revolution every generation. Not with fire arms, but in seeking the best ways to make those words a reality.