They diminished the quantity of votes expected to end a filibuster in the Senate. Filibusters were especially valuable to Southern representatives who tried to piece social equality enactment, including hostile to lynching enactment, until the point that cloture was summoned following a 60 day delay against the Civil Right Act of 1964. In 1975, the Senate lessened the quantity of votes required for cloture from 66% to three-fifths, or 60 of the present one hundred congresspersons.