> The unique, defining feature of our culture is precisely its ability to incorporate every other, and reproduce itself among them and their children.

First, you're conflating America's effectiveness in Anglicizing immigrants with absorbing foreign cultures, which has happened surprisingly little. Our national institutions remain quite Anglo, even though there's pockets of different cultures all over the country.

Second, most good things about American culture trace back to its Anglo roots: https://scholarworks.brandeis.edu/esploro/outputs/book/Albio.... Legalism, orderliness, disposition towards freedom and free markets, entrepreneurialism, egalitarianism, etc.

Areas where we've seen cultural change have been negative. For example, one thing we've lost is the WASP austerity. I know some older folks from New England who grew up learning that "food is for fuel, not enjoyment." Amazing! It's a downgrade that we lost that!

> and it is _American_ culture, not Anglo-American.

No, it's Anglo-American culture: https://www.youtube.com/watch?v=tINJhf1Zs1Q&t=618s. The Anglo countries remain incredibly similar to each other culturally and economically despite the U.S. breaking off from England almost 250 years ago. America is different from England in many ways, but in more or less the same ways it was always different from England.