A form of discrimination that is upheld by the law is called legal discrimination.
De facto segregation refers to segregation that occurred by fact, as opposed to by law. Jim Crow laws refer to laws upheld slavery, and segregated and discriminated against those who would later become African Americans.
The "Supreme Law of the Land" in the United States is the Constitution. This is also referred as the "Supreme Clause".
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The type of government they used was known as Monarchy.
I took me a minute to figure this out, but it is a Secret, right? :D Good riddle!