Shelby County v. Holder is a landmark Supreme Court case decided in 2013 that invalidated key provisions of the Voting Rights Act of 1965, particularly targeting the formula used to determine which jurisdictions required federal approval before changing voting laws. This decision effectively weakened federal oversight of state voting laws, leading to increased political and social resistance to civil rights protections, especially in Southern states, and reshaping the political landscape in Alabama and beyond since the 1970s.