I think that's an idealized interpretation of a young country that spent it's first 100 years believing humanity is attached to skin color, fought a brutal civil war over that before spending its next 100 years preventing most of them from entering commerce, and its last ~50 years incarcerating as many of them as possible. And things like shadow wars in Cambodia do not look good on a country proclaiming "rule of law". So perhaps that's how you perceive it's shared methodology, but certainly not "how it has always been".