In 1964, the U.S. Supreme Court decision in "Reynolds v. Sims" required "one man, one vote" redistricting in all states. It had found that many state legislatures had not redistricted and were unjustly dominated by rural interests, years after the development of densely populated and industrial urban areas. In addition, it found that many states had an upper house based on geographical jurisdictions, such as counties. This gave disproportionate power to rural and lightly populated counties. The court ruled there was no basis for such a structure. Major changes in political apportionment took place in Vermont and other affected states.