Jim Crow laws, in U.S. history, statutes enacted by Southern states and municipalities, beginning in the 1880s, that legalized segregation between blacks and whites. The name is believed to be derived from a character in a popular minstrel song.
Outlining, because your essay is based on the claim you come up with
In the Spanish colonies in America the colonists created a kind of caste system based on ethnic hierarchy which of course put the Spaniards on top. The rest of ethnic groups ranked based on their resemblance of the Spaniards so for example the Indians would be ranked higher than Blacks as they more resembled the Spaniards.