Grandfather clauses were legal provisions enacted in the late 19th and early 20th centuries, allowing individuals to bypass certain restrictions based on their historical status or privileges. These clauses were primarily used in the context of voting rights, enabling white voters to circumvent literacy tests and poll taxes that disenfranchised Black voters, effectively upholding racial segregation and the Jim Crow laws that proliferated during this period. They served to protect the voting rights of those who had the right to vote before certain laws were enacted, while systematically disenfranchising African Americans and other marginalized groups.