That’s a peculiar statement, considering the U.S. is essentially the most recent major nation (and one of very few) to be formed and grown, about as far from the intense pressures of previously established cultural or governmental influences (both from within, or from surrounding territories) as you can get, without leaving the planet.

…If that’s not considered relatively modern when compared to the rest of the world, what is?

Do you press your mouth against the toilet and flap your tongue around on it?