"On January 5 2022 the governor of Louisiana posthumously pardoned Homer Plessy the defendant in the famous 1896 U.S. Supreme Court case Plessy v. Ferguson. Plessy is known for affirming the legal theory of 'separate but equal' that was used to justify Jim Crow laws in the 19th and 20th centuries. It was later overturned in part by Brown v. Board of Education."