[227]*227Mr. Justice Frankfurter
delivered the opinion of the Court.
Whether the use of conventional, peaceful activities by a union in controversy with a rival union over certain jobs is a violation of the Sherman Law, Act of July 2, 1890, 26 Stat. 209, as amended, 15 U. S. C. § 1, is the question. It is sharply presented in this case because it arises in a criminal prosecution. Concededly an injunction either at the suit of the Government or of the employer could not issue.
Summarizing the long indictment, these are the facts. Anheuser-Busch, Inc., operating a large plant in St. Louis, contracted with Borsari Tank Corporation for the erection of an additional facility. The Gaylord Container Corporation, a lessee of adjacent property from AnheuserBusch, made a similar contract for a new building with the Stocker Company. Anheuser-Busch obtained the [228]*228materials for its brewing and other operations and sold its finished products largely through interstate shipments. The Gaylord Corporation was equally dependent on interstate commerce for marketing its goods, as were the construction companies for their building materials. Among the employees of Anheuser-Busch were members of the United Brotherhood of Carpenters and Joiners of America and of the International Association of Machinists. The conflicting claims of these two organizations, affiliated with the American Federation of Labor, in regard to the erection and dismantling of machinery had long been a source of controversy between them. Anheuser-Busch had had agreements with both organizations whereby the Machinists were given the disputed jobs and the Carpenters agreed to submit all disputes to arbitration. But in 1939 the president of the Carpenters, their general representative, and two officials of the Carpenters’ local organization, the four men under indictment, stood on the claims of the Carpenters for the jobs. Rejection by the employer of the Carpenters’ demand and the refusal of the latter to submit to arbitration were followed by a strike of the Carpenters, called by the defendants against Anheuser-Busch and the construction companies, a picketing of Anheuser-Busch and its tenant, and a request through circular letters and the official publication of the Carpenters that union members and their friends refrain from buying Anheuser-Busch beer.
These activities on behalf of the Carpenters formed the charge of the indictment as a criminal combination and conspiracy in violation of the Sherman Law. Demurrers denying that what was charged constituted a violation of the laws of the United States were sustained, 32 F. Supp. 600, and the case came here under the Criminal Appeals Act. Act of March 2, 1907, 34 Stat. 1246, 18 U. S. C. § 682; Judicial Code § 238, 28 U. S. C. § 346.
[229]*229In order to determine whether an indictment charges an offense against the United States, designation by the pleader of the statute under which he purported to lay the charge is immaterial. He may have conceived the charge under one statute which would not sustain the indictment but it may nevertheless come within the terms of another statute. See Williams v. United States, 168 U. S. 382. On the other hand, an indictment may validly satisfy the statute under which the pleader proceeded, but other statutes not referred to by him may draw the sting of criminality from the allegations. Here we must consider not merely the Sherman Law but the related enactments which entered into the decision of the district court.
Section 1 of the Sherman Law on which the indictment rested is as follows: “Every contract, combination in the form of trust or otherwise, or conspiracy, in restraint of trade or commerce among the several States, or with foreign nations, is hereby declared to be illegal.” The controversies engendered by its application to trade union activities and the efforts to secure legislative relief from its consequences are familiar history. The Clayton Act of 1914 was the result. Act of October 15, 1914, 38 Stat. 730. “This statute was the fruit of unceasing agitation, which extended over more than twenty years and was designed to equalize before the law the position of workingmen and employer as industrial combatants.” Duplex Co. v. Deering, 254 U. S. 443, 484. Section 20 of that Act, which is set out in the margin in full,1 with[230]*230drew from the general interdict of the Sherman Law specifically enumerated practices of labor unions by prohibiting injunctions against them — since the use of the injunction had been the major source of dissatisfaction— and also relieved such practices of all illegal taint by the catch-all provision, “nor shall any of the acts specified in this paragraph be considered or held to be violations of any law of the United States.” The Clayton Act gave rise to new litigation and to renewed controversy in and out of Congress regarding the status of trade unions. By the generality of its terms the Sherman Law had necessarily compelled the courts to work out its meaning from case to case. It was widely believed that into the Clayton Act courts read the very beliefs which that Act was designed to remove. Specifically the courts restricted the scope of § 20 to trade union activities directed against an employer by his own employees. Duplex Co. v. Deer[231]*231ing, supra. Such a view it was urged, both by powerful judicial dissents and informed lay opinion, misconceived the area of economic conflict that had best be left to economic forces and the pressure of public opinion and not subjected to the judgment of. courts. Ibid., p. 485-486. Agitation again led to legislation and in 1932 Congress wrote the Norris-LaGuardia Act. Act of March 23, 1932, 47 Stat. 70, 29 U. S. C. §§ 101-115.
" The Norris-LaGuardia Act removed the fetters upon trade union activities, which according to judicial construction § 20 of the Clayton Act had left untouched, by still further narrowing the circumstances under which the federal courts could grant injunctions in labor disputes. More especially, the Act explicitly formulated the “public policy of the United States” in regard to the industrial conflict,2 and by its light established that the allowable area of union activity was not to be restricted, as it had been in the Duplex case, to an immediate employer-employee relation. Therefore, whether trade union conduct constitutes a violation of the Sherman Law is to be determined only by reading the Sherman Law and § 20 of the Clayton Act and the Norris-LaGuardia Act as a harmonizing text of outlawry of labor conduct.
[232]
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[227]*227Mr. Justice Frankfurter
delivered the opinion of the Court.
Whether the use of conventional, peaceful activities by a union in controversy with a rival union over certain jobs is a violation of the Sherman Law, Act of July 2, 1890, 26 Stat. 209, as amended, 15 U. S. C. § 1, is the question. It is sharply presented in this case because it arises in a criminal prosecution. Concededly an injunction either at the suit of the Government or of the employer could not issue.
Summarizing the long indictment, these are the facts. Anheuser-Busch, Inc., operating a large plant in St. Louis, contracted with Borsari Tank Corporation for the erection of an additional facility. The Gaylord Container Corporation, a lessee of adjacent property from AnheuserBusch, made a similar contract for a new building with the Stocker Company. Anheuser-Busch obtained the [228]*228materials for its brewing and other operations and sold its finished products largely through interstate shipments. The Gaylord Corporation was equally dependent on interstate commerce for marketing its goods, as were the construction companies for their building materials. Among the employees of Anheuser-Busch were members of the United Brotherhood of Carpenters and Joiners of America and of the International Association of Machinists. The conflicting claims of these two organizations, affiliated with the American Federation of Labor, in regard to the erection and dismantling of machinery had long been a source of controversy between them. Anheuser-Busch had had agreements with both organizations whereby the Machinists were given the disputed jobs and the Carpenters agreed to submit all disputes to arbitration. But in 1939 the president of the Carpenters, their general representative, and two officials of the Carpenters’ local organization, the four men under indictment, stood on the claims of the Carpenters for the jobs. Rejection by the employer of the Carpenters’ demand and the refusal of the latter to submit to arbitration were followed by a strike of the Carpenters, called by the defendants against Anheuser-Busch and the construction companies, a picketing of Anheuser-Busch and its tenant, and a request through circular letters and the official publication of the Carpenters that union members and their friends refrain from buying Anheuser-Busch beer.
These activities on behalf of the Carpenters formed the charge of the indictment as a criminal combination and conspiracy in violation of the Sherman Law. Demurrers denying that what was charged constituted a violation of the laws of the United States were sustained, 32 F. Supp. 600, and the case came here under the Criminal Appeals Act. Act of March 2, 1907, 34 Stat. 1246, 18 U. S. C. § 682; Judicial Code § 238, 28 U. S. C. § 346.
[229]*229In order to determine whether an indictment charges an offense against the United States, designation by the pleader of the statute under which he purported to lay the charge is immaterial. He may have conceived the charge under one statute which would not sustain the indictment but it may nevertheless come within the terms of another statute. See Williams v. United States, 168 U. S. 382. On the other hand, an indictment may validly satisfy the statute under which the pleader proceeded, but other statutes not referred to by him may draw the sting of criminality from the allegations. Here we must consider not merely the Sherman Law but the related enactments which entered into the decision of the district court.
Section 1 of the Sherman Law on which the indictment rested is as follows: “Every contract, combination in the form of trust or otherwise, or conspiracy, in restraint of trade or commerce among the several States, or with foreign nations, is hereby declared to be illegal.” The controversies engendered by its application to trade union activities and the efforts to secure legislative relief from its consequences are familiar history. The Clayton Act of 1914 was the result. Act of October 15, 1914, 38 Stat. 730. “This statute was the fruit of unceasing agitation, which extended over more than twenty years and was designed to equalize before the law the position of workingmen and employer as industrial combatants.” Duplex Co. v. Deering, 254 U. S. 443, 484. Section 20 of that Act, which is set out in the margin in full,1 with[230]*230drew from the general interdict of the Sherman Law specifically enumerated practices of labor unions by prohibiting injunctions against them — since the use of the injunction had been the major source of dissatisfaction— and also relieved such practices of all illegal taint by the catch-all provision, “nor shall any of the acts specified in this paragraph be considered or held to be violations of any law of the United States.” The Clayton Act gave rise to new litigation and to renewed controversy in and out of Congress regarding the status of trade unions. By the generality of its terms the Sherman Law had necessarily compelled the courts to work out its meaning from case to case. It was widely believed that into the Clayton Act courts read the very beliefs which that Act was designed to remove. Specifically the courts restricted the scope of § 20 to trade union activities directed against an employer by his own employees. Duplex Co. v. Deer[231]*231ing, supra. Such a view it was urged, both by powerful judicial dissents and informed lay opinion, misconceived the area of economic conflict that had best be left to economic forces and the pressure of public opinion and not subjected to the judgment of. courts. Ibid., p. 485-486. Agitation again led to legislation and in 1932 Congress wrote the Norris-LaGuardia Act. Act of March 23, 1932, 47 Stat. 70, 29 U. S. C. §§ 101-115.
" The Norris-LaGuardia Act removed the fetters upon trade union activities, which according to judicial construction § 20 of the Clayton Act had left untouched, by still further narrowing the circumstances under which the federal courts could grant injunctions in labor disputes. More especially, the Act explicitly formulated the “public policy of the United States” in regard to the industrial conflict,2 and by its light established that the allowable area of union activity was not to be restricted, as it had been in the Duplex case, to an immediate employer-employee relation. Therefore, whether trade union conduct constitutes a violation of the Sherman Law is to be determined only by reading the Sherman Law and § 20 of the Clayton Act and the Norris-LaGuardia Act as a harmonizing text of outlawry of labor conduct.
[232]*232Were, then, the acts charged against the defendants prohibited, or permitted, by these three interlacing statutes? If the facts laid in the indictment come within the conduct enumerated in § 20 of the Clayton Act they do not constitute a crime within the general terms of the Sherman Law because of the explicit command of that section that such conduct shall not be “considered or held to be violations of any law of the United States.” So long as a union acts in its self-interest and does not combine with non-labor groups,3 the licit and the illicit under § 20 are not to be distinguished by any judgment regarding the wisdom or unwisdom, the rightness or wrongness, the selfishness or unselfishness of the end of which the particular union activities are the means. There is nothing remotely within the terms of § 20 that differentiates between trade union conduct directed against an employer because of a controversy arising in the relation between employer and employee, as such, and conduct similarly directed but ultimately due to an internecine struggle between two unions seeking the favor of the same employer. Such strife between competing unions has been an obduraté conflict in the evolution of so-called craft unionism and has undoubtedly been one of the potent forces in the modern development of industrial unions. These conflicts have intensified industrial tension but there is not the slightest warrant for saying that Congress has made § 20 inapplicable to trade union conduct resulting from them.
In so far as the Clayton Act is concerned, we must therefore dispose of this case as though we had before us precisely the same conduct on the part of the defendants in pressing claims against Anheuser-Busch for in[233]*233creased wages, or shorter hours, or other elements of what are called working conditions. The fact that what was done was done in a competition for jobs against the Machinists rather than against, let us say, a company union is a differentiation which Congress has not put into the federal legislation and which therefore we cannot write into it.
It is at once apparent that the acts with which the defendants are charged are the kind of acts protected by § 20 of the Clayton Act. The refusal of the Carpenters to work for Anheuser-Busch or on construction work being done for it and its adjoining tenant, and the peaceful attempt to get members of other unions similarly to refuse to work, are plainly within the free scope accorded to workers by § 20 for “terminating any relation of employment,” or “ceasing to perform any work or labor,” or “recommending, advising, or persuading others by peaceful means so to do.” The picketing of Anheuser-Busch premises with signs to indicate that Anheuser-Busch was unfair to organized labor, a familiar practice in these situations, comes within the language “attending at any place where any such person or persons may lawfully be, for the purpose of peacefully obtaining or communicating information, or from peacefully persuading any person to work or to abstain from working.” Finally, the recommendation to union members and their friends not to buy or use the product of Anheuser-Busch is explicitly covered by “ceasing to patronize . . . any party to such dispute, or.from recommending, advising, or persuading others by peaceful and lawful means so to do.”
Clearly, then, the facts here charged constitute lawful conduct under the Clayton Act unless the defendants cannot invoke that Act because outsiders to the immediate dispute also shared in the conduct. But we need not determine whether the conduct is legal within the restrictions which Duplex Co. v. Deering gave to the im[234]*234munities of § 20 of the Clayton Act. Congress in the Norris-LaGuardia Act has expressed the public policy of the United States and defined its conception of a “labor dispute” in terms that no longer leave room for doubt. Milk Wagon Drivers’ Union v. Lake Valley Farm Products, 311 U. S. 91. This was done, as we recently said, in order to “obviate the results of the judicial construction” theretofore given the Clayton Act. New Negro Alliance v. Sanitary Grocery Co., 303 U. S. 552, 562; see Apex Hosiery Co. v. Leader, 310 U. S. 469, 507, n. 26. Such a dispute, § 13 (c) provides, “includes any controversy concerning terms or conditions of employment, or concerning the association or representation of persons in negotiating, fixing, maintaining, changing, or seeking to arrange terms or conditions of employment, regardless of whether or not the disputants stand in the proximate relation of employer and employee.” 4 And under § 13 (b) a person is “participating or interested in a labor dispute” if he “is engaged in the same industry, trade, craft, or occupation, in which such dispute occurs, or has a direct or indirect interest therein, or is a member, officer, or agent of any association composed in whole or in part of employers or employees engaged in such industry, trade, craft, or occupation.”
To be sure, Congress expressed this national policy and determined the bounds of a labor dispute in an act explicitly dealing with the further withdrawal of injunctions in labor controversies. But to argue, as it was urged before us, that the Duplex case still governs for purposes of a criminal prosecution is to say that that which on the equity side of the court is allowable conduct may in a criminal proceeding become the road to [235]*235prison. It would be strange indeed that although neither the Government nor Anheuser-Busch could have sought an injunction against the acts here challenged, the elaborate efforts to permit such conduct failed to prevent criminal liability punishable with imprisonment and heavy fines. That is not the way to read the will of Congress, particularly when expressed by a statute which, as we have already indicated, is practically and historically one of a series of enactments touching one of the most sensitive national problems. Such legislation must not be read in a spirit of mutilating narrowness. On matters far less vital and far less interrelated we have had occasion to point out the importance of giving “hospitable scope” to Congressional purpose even when meticulous words are lacking. Keifer & Keijer v. Reconstruction Finance Corp., 306 U. S. 381, 391, and authorities there cited. The appropriate way to read legislation in a situation like the one before us, was indicated by Mr. Justice Holmes on circuit: “A statute may indicate or require as its justification a change in the policy of the law, although it expresses that change only in the specific cases most likely to occur in the mind. The Legislature has the power to decide what the policy of the law shall be, and if it has intimated its will, however indirectly, that will should be recognized and obeyed. The major premise of the conclusion expressed in a statute, the change of policy that induces the enactment, may not be set out in terms, but it is not an adequate discharge of duty for the courts to say: We see what you are driving at, but you have not said it, and therefore we shall go on as before.” Johnson v. United States 163 F. 30, 32.
The relation of the Norris-LaGuardia Act to the Clayton Act is not that of a tightly drawn amendment to a technically phrased tax provision. The underlying aim [236]*236of the Norris-LaGuardia Act was to restore the broad purpose which Congress thought it had formulated in the Clayton Act but which was frustrated, so Congress believed, by unduly restrictive judicial construction. This was authoritatively stated by the House Committee on the Judiciary. “The purpose of the bill is to protect the rights of labor in the same manner the Congress intended when it enacted the Clayton Act, October 15, 1914 (38 Stat. L., 738), which act, by reason of its construction and application by the Federal courts, is ineffectual to accomplish the congressional intent.” H. Rep. No. 669, 72d Congress, 1st Session, p. 3. The Norris-LaGuardia Act was a disapproval of Duplex Printing Press Co. v. Deering, supra, and Bedford Cut Stone Co. v. Journeymen Stone Cutters’ Assn., 274 U. S. 37, as the authoritative interpretation of § 20 of the Clayton Act, for Congress now placed its own meaning upon that section. The Norris-LaGuardia Act reasserted the original purpose of the Clayton Act by infusing into it the immunized trade union activities as redefined by the later Act. In this light § 20 removes all such allowable conduct from the taint of being a “violation of any law of the United States,” including the Sherman Law.
There is no profit in discussing those eases under the Clayton Act which were decided before the courts were furnished the light shed by the Norris-LaGuardia Act on the nature of the industrial conflict. And since the facts in the indictment are made lawful by the Clayton Act in so far as “any law of the United States” is concerned, it would be idle to consider the Sherman Law apart from the Clayton Act as interpreted by Congress. Cf. Apex Hosiery Co. v. Leader, 310 U. S. 469. It was precisely in order to minimize the difficulties to which the general language of the Sherman Law in its application to workers had given rise, that Congress cut through all the tangled verbalisms and enumerated concretely the types [237]*237of activities which had become familiar incidents of union procedure.
Affirmed.
Mr. Justice Murphy took no part in the disposition of this case.