How successful was the voting rights act of 1965?

President Johnson's support of the Voting Rights Act of 1965 reflected the pressures from the massive civil rights protests of the early and middle 1960s. ... Signed in August 1965, the act struck down two methods Southern whites had long employed to keep blacks from voting — literacy tests and poll taxes.

1833 is when they passed the Slavery Abolition Act. 1838 is when slaves were fully free. Therefore Britain abolished slavery in 1833, before the United States did.