We review from the standpoint of its validity under the Federal Constitution a judgment of civil contempt entered against petitioner, the National Association for the Advancement of Colored People, in the courts of Alabama. The question presented is whether Alabama, consistently with the Due Process Clause of the Fourteenth Amendment, can compel petitioner to reveal to the State's Attorney General the names and addresses of all its Alabama members and agents, without regard to their positions or functions in the Association. The judgment of contempt was based upon petitioner's refusal to comply fully with a court order requiring in part the production of membership lists. Petitioner's claim is that the order, in the circumstances shown by this record, violated rights assured to petitioner and its members under the Constitution.