here we go....
Define american culture? Individualism and freedom?
GTFOH. We haven't had this dance in a long time. Your definition of "american culture" has always been some pie in the sky idealistic, unrealistic, "made for a tee-shirt" slogan.
For starters teh guy in your article is comparing changing opinion on from a geocentric to heliocentric like there was some "choice" in the matter. Facts dictated the change in this paradigm, not choice. People didn't decide "imply because" that they would believe the sun was the center of the universe, it became common knowledge. Yes it did effect some of the beliefs, but the illusion of choice is false in his example...just saying...
What's funny is he says, "It was greek ideas not culture" but then says, "It’s rational advocates—not numbers—that bring ideas into effect." really failing to admit that NUMBERS ARE RATIONAL.
He touts england's "freedom" during the 1820 but fails to mention slavery wasn't abolished until 1833.
I do agree that an attempt to limit immigration out of fear that it'll change is dumb. Change brings about good things when cultures collide...eventually. It's an evolutionary process of sorts, survival of the fittest (so i agree to a degree). I don't think it's "freedom and individuality" that define american culture, those two things exist in many, many parts of the world, even in those where we see a lot of immigrants migrating to the USA.