The native Americans, Europeans, and west Africa. Hope that helps
Well, to start, the Supreme Court could have ruled differently in Plessy v. Ferguson.
In Plessy, the Supreme Court condoned the practice of "separate but equal" making it permissible for the white south (and north) to create discriminatory practices.
Answer: yes and no. For the most part yes as it allows the government to pick and choose what is and isn't recognized as a local currency. A good example of fiat money is gold.
People revolted
People wanted to leave the country but couldn't.