Answer
Davy Crockett
Explanation:
The legendary frontiersman and Tennessee congressman Davy Crockett opposed the Indian Removal Act, declaring that his decision would “not make me ashamed in the Day of Judgment.” he also wrote a letter criticizing the removal act.
In the case of Plessi v. Ferguson (1896), the U.S. Supreme Court ruled on the doctrine of Division, but the equality of citizens and which for half a century delayed the process of obtaining black citizens of the United States equal with white civil rights. This decision gave the legal basis for racial segregation in the USA, forcing black Americans to study in schools only for blacks, to use special, reserved for them public places.
Protect interests of bystanders.
I think it was the decimal system and concept of zero
