Justice HARLAN: We review from the point of its validity under the Federal stitution a judgment of civil contempt ered against the National Association for Advancement of Colored People, in the ts 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.... Petitioner produced substantially all the data called for . .. except its membership lists, as to which it contended that Alabama could not constitutionally compel disclosure. .. The Association both urges that it is constitutionally entitled to resist official inquiry into its membership lists, and that it may assert, on behalf of its members, a right personal to them to be protected from compelled disclosure by the State of their affiliation with the Association as revealed by the membership lists. We think that petitioner argues more appropriately the rights of its members, and that its nexus with them is sufficient to permit that it act as their representative before this Court. In so concluding) we reject respondent's argument that the Association lacks standing to assert here constitutional rights pertaining to the members, who are not of course parties to the litigation.... If petitioner's rank-and-file members are constitutionally entitled to withhold their connection with the Association despite the production order, it is manifest that this right is properly assertable by the Association. To require that it be claimed by the members themselves would result in nullification of the right at the very moment of its assertion.... We thus reach petitioner's claim that the production order in the state litigation trespasses upon fundamental freedoms protected by the Due Process Clause of the Fourteenth Amendment. Petitioner argues that in view of the facts and circumstances shown in the record, the effect of compelled disclosure of the membership lists will be to abridge the rights of its rank-and-file members to engage in lawful association in support of their common beliefs. It contends that governmental action which, although not directly suppressing association, nevertheless carries this consequence, can be justified only upon some overriding valid interest of the State. Effective advocacy of both public and private points of view, particularly controversial ones, is undeniably enhanced by group association, as this Court has more than once recognized by remarking upon the close nexus between the freedoms of speech and assembly. It is beyond debate that freedom to engage in association for the advancement of beliefs and ideas is an inseparable aspect of the "liberty" assured by the Due Process Clause of the Fourteenth Amendment, which embraces freedom of speech. [Cites cases] Of course, it is immaterial whether the beliefs sought to be advanced by association pertain to political, economic, religious or cultural matters, and state action which may have the effect of curtailing the freedom to associate is subject to the closest scrutiny The fact that Alabama, so far as is relevant to the validity of the contempt judgment presently under review, has taken no direct action to restrict the right of petitioner's members to associate freely, does not end inquiry into the effect of the production order. In the domain of these indispensable liberties, whether of speech, press, or association, the decisions of this Court recognize that abridgment of such rights, even though unintended, may inevitably follow from varied forms of governmental action. . .. It is hardly a novel perception that compelled disclosure of affiliation with groups engaged in advocacy may constitute as effective a restraint on freedom of association as the forms of governmental action in the cases above were thought likely to produce upon the particular constitutional rights there involved. This Court has recognized the vital relationship between freedom to associate and privacy in one's associations. When referring to the varied forms of governmental action which might interfere with freedom of assembly, it said in American Communications Ass'n v. Douds, 339 U. S. 402, "A requirement that adherents of particular religious faiths or political parties wear identifying arm-bands, for example, is obviously of this nature." Compelled disclosure of membership in an organization engaged in advocacy of particular beliefs is of the same order. Inviolability of privacy in group association may in many circumstances be indispensable to preservation of freedom of association, particularly where a group espouses dissident beliefs. We think that the production order, in the respects here drawn in question, must be regarded as entailing the likelihood of a substantial restraint upon the exercise by petitioner's members of their right to freedom of association. Petitioner has made an uncontroverted showing that on past occasions revelation of the identity of its rank and-61 members has exposed these members to economic reprisal, loss of employment, threat of physical coercion, and other manifestations of public hostility.... It is not sufficient to answer, as the State does here, that whatever repressive effect compulsory disclosure of names of petitioner's members may have upon participation by Alabama citizens in petitioner's activities follows not from state action but from private community pressures. The crucial factor is the interplay of governmental and private action, for it is only after the initial exertion of state power represented by the production order that private action takes hold....