The freedom to associate with organizations dedicated to the "advancement of beliefs and ideas" is an inseparable part of the Due Process Clause of the Fourteenth Amendment. Decided June 30, 1958 (argued 1958). Opinion of the Court: Harlan Applied: the Fourteenth Amendment → go there Topic: Freedom of association. National Association for the Advancement of Colored People v. Alabama, 357 U.S. 449 (1958), is a landmark decision of the US Supreme Court. Alabama sought to prevent the NAACP from conducting further business in the state. After the circuit court issued a restraining order, the state issued a subpoena for various records, including the NAACP's membership lists. The Supreme Court ruled unanimously that Alabama's demand for the lists violated the right of due process guaranteed by the Fourteenth Amendment to the United States Constitution. Wiki link