What were the advantages and limitations of the twenty-fourth amendment for advancing the civil rights movement?

The 24th amendment was important to the Civil Rights Movement as it ended mandatory poll taxes that prevented many African Americans.  Poll taxes, combined with grandfather clauses and intimidation, effectively prevented African Americans from having any sort of political power, especially in the South.  When the 24th amendment passed, five southern states, Virginia, Alabama, Texas, Arkansas, and Mississippi still had poll taxes.  Most Southern states, at one time or another had poll taxes and in severe cases, had cumulative poll taxes that required the voter to pay taxes not just from that year, but also previous years they had not voted.

b. the 200th birthday of the united states