You take a strong court system for granted, even if you don't use it. You know that if you went into business and had problems with a customer, partner, or supplier, you could take them to court. It's not all that necessary to learn foreign languages anyway. Everybody knows that Mustard comes in jars. Shaving cream comes in cans.
Milk comes in plastic jugs or cardboard boxes, and occasionally in bottles.
The decimal point is a dot. Certainly not a comma. A billion is a thousand times a million. It was a time when the country came together and did what was right. And instead of insisting on vengeance, the US very generously rebuilt Europe instead, with the Marshall Plan.