Affirmed by published opinion. Judge DIAZ wrote the opinion, in which Judge MOTZ and Senior Judge HAMILTON concurred.
OPINION
We consider in this case whether the Appellants have alleged viable claims under the Torture Victim Protection Act (“TVPA”), 28 U.S.C. § 1350, note, or the Alien Tort Statute (“ATS”), 28 U.S.C. § 1350. The Appellants filed a class action complaint under these statutes, alleging that Defendant Alcolac, Inc., a chemical manufacturer, sold thiodiglycol (“TDG”) to Saddam Hussein’s Iraqi regime, which then used it to manufacture mustard gas to attack Kurdish enclaves in northern Iraq during the late 1980s. 1
*390 In granting Alcolac’s motion to dismiss pursuant to Fed.R.Civ.P. 12(b)(6), the district court held that corporations are not subject to suit under the TVPA, and that the Appellants had not pleaded facts sufficient to support a reasonable inference that Aleolac provided TDG to Iraq with the purpose of facilitating genocide against the Kurds, which the district court determined was an element of a claim under the ATS.
We agree with the district court that the TVPA excludes corporations from liability. We further conclude that the ATS imposes liability for aiding and abetting violations of international law, but only if the attendant conduct is purposeful. The Appellants, however, have failed to plead facts sufficient to support the intent element of their ATS claims. Accordingly, we affirm the judgment of the district court.
I.
A.
For purposes of resolving this appeal, we accept as true the facts alleged by the Appellants in the Amended Complaint. In the 1980s, the Republic of Iraq, then under the dictatorial control of Saddam Hussein, was embroiled in a long-term armed conflict with Iran. International news media widely reported and the governments of many countries — including the United States, the United Kingdom, and Germany — explicitly condemned the Iraqi regime’s large-scale use of mustard gas and other chemical weapons against Iran. Simultaneously, Iraq launched chemical weapon attacks against the Kurds in northern Iraq, whom Hussein accused of collaborating with Iran.
As a result, many international businesses, including commercial chemical manufacturers, cut off ties with Hussein’s regime. In April 1984, following the issuance of an investigative report commissioned by the U.N. Secretary General finding that mustard gas and other chemical weapons had been used in the Iraq-Iran war, an international coalition of governments known as the Australia Group 2 imposed licensing restrictions on the export of chemicals used in the manufacture of chemical weapons.
Aleolac, then a subsidiary of the British conglomerate Rio Tinto Zinc, began selling TDG under the trade name Kromfax in the early 1980s. 3 TDG has many lawful commercial applications; for example, it is used as a solvent in dyeing textiles and producing inks. As early as 1982, however, Aleolac was also aware that TDG could be used to manufacture mustard gas.
Representatives from the U.S. Customs Service and the U.S. State Department specifically warned Aleolac that TDG was subject to export restrictions. Despite these warnings, in late 1987 Aleolac fulfilled an order for 120 tons of Kromfax from Colimex, a German company. This order, about ten times larger than any Aleolac had ever received, was eventually transshipped to Iran via Singapore.
*391 In late 1987 and early 1988, Alcolac also delivered four shipments of Kromfax totaling over one million pounds to NuKraft Mercantile Corporation, a company in Brooklyn, New York, with whom Alcolac had not previously done business. Alcolac knew that NuKraft was a shell corporation created to facilitate the purchase of Kromfax for shipment to Europe and transshipment elsewhere via a Swiss company identified as “Companies Inc.,” and that NuKraft intended to place further orders in the three to six million pound range annually.
In February 1989, Alcolac pleaded guilty to a single count of violating the Export Administration Act, 50 U.S.C. app. § 2410(a), in connection with the 1987 Kromfax order to Colimex. During the plea hearing, the government also proffered facts relating to a sale of Kromfax to NuKraft that the government believed ultimately reached Iraq; however, Alcolac was not prosecuted for that sale.
The four Kromfax shipments that Alcolac delivered to NuKraft did reach Iraq, where they were processed to manufacture mustard gas used to attack the Kurds. The Iraqi regime’s use of chemical weapons against the Kurds left thousands dead, maimed, or suffering from physical and psychological trauma.
B.
The Appellants are individuals of Kurdish descent who are either victims of mustard gas attacks or family members of deceased victims. The Amended Complaint identifies two classes of plaintiffs. The Class A Plaintiffs, who are U.S. citizens and permanent residents, advance claims against Alcolac under the TVPA. The Class B Plaintiffs, who are foreign nationals, assert claims against Alcolac under the ATS. The district court granted Alcolac’s motion to dismiss by memorandum and order dated June 9, 2010. The Appellants filed this timely appeal.
II.
We review de novo a district court’s decision to dismiss for failure to state a claim, assuming all well-pleaded, nonconclusory factual allegations in the complaint to be true.
Ashcroft v. Iqbal,
III.
A.
We first address the district court’s dismissal of the TVPA claims. Enacted in 1992, the TVPA provides “a civil action for recovery of damages from an individual who engages in torture or extrajudicial killing.” Pub.L. No. 102-256, 106 Stat. 73 (codified at 28 U.S.C. § 1350, note). In pertinent part, the TVPA states as follows:
(a) Liability. — An individual who, under actual or apparent authority, or color of law, of any foreign nation—
*392 (1) subjects an individual to torture shall, in a civil action, be liable for damages to that individual; or
(2) subjects an individual to extrajudicial killing shall, in a civil action, be liable for damages to the individual’s legal representative, or to any person who may be a claimant in an action for wrongful death.
Id. § 2(a).
The .district court determined that Alcolac, as a corporation, is not an “individual” subject to liability under the TVPA. The district court noted the absence of Fourth Circuit precedent and the presence of a circuit split on this question.
Compare Khulumani v. Barclay Nat’l Bank Ltd.,
B.
Whether Alcolac is an “individual” within the meaning of the TVPA is a question of statutory interpretation. Our objective in all such cases is “to ascertain and implement the intent of Congress,” and Congress’s intent “can most easily be seen in the text of the Acts it promulgates.”
Broughman v. Carver,
We hold that the TVPA admits of no ambiguity and Congress’s intent to exclude corporations from liability under the TVPA is readily ascertainable from a plain-text reading.
5
To that end, unless there is “explicit legislative intent to the contrary,” we are to give the words of a statute their “plain and ordinary meaning.”
Carbon Fuel Co. v. USX Corp.,
This broader meaning is also consistent with that found in the Dictionary Act, which prescribes default rules of construction for interpreting acts of Congress. As is relevant here, the Dictionary Act provides that “[i]n determining the meaning of any Act of Congress, unless the context indicates otherwise ... the word[ ] ‘person’ ... include[s] corporations ... as well as individuals.” 1 U.S.C. § 1 (2006). Thus, Congress has directed courts — when interpreting a federal statute — to give a broader reach to the noun “person” to include both corporations and individuals. In our view, then, when Congress uses the noun “individual” — rather than the broader term “person” — it should ordinarily be construed to mean a human being or natural person.
This presumptive construction strikes us as particularly appropriate because there “is no indication Congress intended ‘individual’ to have a variety of meanings throughout the TVPA.”
Bowoto,
Additionally, we note that the term “person” appears in the TVPA, in reference to those “who may be [] claimants] in an action for wrongful death.” 28 U.S.C. § 1350, note § 2(a)(2) (2006). As the D.C. Circuit recently noted, a claimant under the TVPA could be a juridical person, such as the estate of a victim-of-torture decedent.
See Mohamad,
Clinton v. City of New York,
Although the Court recognized that the term “individual” in ordinary usage often refers to a single human being while “person” has a broader meaning,
id.
at 428 n. 13,
Accordingly, we affirm the judgment of the district court dismissing the Appellants’ claims under the TVPA.
IV.
We turn next to the dismissal of the Appellants’ ATS claims and again review the district court’s holding de novo. The district court assumed that the Appellants stated viable ATS claims against the Republic of Iraq, based on international norms that prohibit the development, manufacture, stockpiling, and use of chemical weapons. The Appellants, however, do not assert that Alcolac directly engaged in these acts, but rather that it aided and abetted Iraq in committing them. The gravamen of the Appellants’ ATS claims is that Alcolac sold quantities of Kromfax to NuKraft with actual or constructive knowledge that such quantities would ultimately be used by Iraq in the manufacture of mustard gas to attack the Kurds.
As it did before the district court, Alcolac contends here that the ATS bars the Appellants from seeking relief on an aiding and abetting theory because such a claim is not recognized under international law. Alternatively, Alcolac contends that the Appellants do not allege facts sufficient to show that Alcolac acted with the purpose of facilitating genocide against the Kurds, which Alcolac asserts is an element of the claim. 6 The Appellants urge that the ATS imposes liability for violations of international law on principals as well as aiders and abettors. The Appellants argue further that ATS aiding and abetting claims do not require a showing of purpose, but that their allegations in the Amended Complaint met that standard in any event.
The district court assumed the viability of an aiding and abetting claim under international law, but agreed with Alcolac that the Appellants had failed to allege the requisite mens rea to make out their claims under the ATS. We turn now to consider that ruling.
A.
The ATS was passed by the First Congress as part of the Judiciary Act of 1789
*395
and provides in its current form: “The district courts shall have original jurisdiction of any civil’action by an alien for a tort only, committed in violation of the law of nations or a treaty of the United States.” 28 U.S.C. § 1350 (2006).
7
The Supreme Court’s seminal exposition on the ATS arrived in
Sosa v. Alvarez-Machain,
The Court in
Sosa
noted the presence of radically differing historical interpretations of the ATS, stemming from uncertainty as to whether the statute simply vested federal courts with jurisdiction, neither creating nor authorizing judicial recognition of any particular rights of action absent further congressional action, or instead enabled federal courts to hear cognizable claims without further congressional action. The Court ultimately concluded that the ATS is a jurisdictional statute, albeit one that “enable[s] federal courts to hear claims in a very limited category defined by the law of nations and recognized at common law.”
Id.
at 712,
Regarding this “very limited category” of claims, the Court found no basis to think that Congress was mindful of any specific examples other than those corresponding to violations recognized by the criminal law of England relating to “violation of safe conducts, infringement of the rights of ambassadors, and piracy.”
Id.
at 724,
B.
The Appellants’ specific claim under the ATS is that Alcolac aided and abetted the Iraqi regime’s use of mustard gas to attack the Kurds. Accordingly, we first consider whether the ATS permits suits for aiding and abetting a violation of international law and, if so, the requisite mens rea for prosecuting such an action.
Following Sosa, the precise question of accessorial liability under the ATS initially vexed lower federal courts. A few refused to recognize it, reasoning that the Supreme Court’s decision in
Central Bank of Denver v. First Interstate Bank of Denver,
In recognizing aiding and abetting claims under the ATS, the Second Circuit and the D.C. Circuit both held that
Central Bank
does not preclude them.
Doe VIII,
We turn next to the parties’ competing contentions as to the applicable mens rea for the claim. Alcolae urges us to uphold the district court’s specific intent mens rea standard, which the latter derived from the Second Circuit’s opinion in
Talisman.
The
Talisman
panel, in turn, was persuaded by Judge Katzmann’s concurring opinion in
Khulumani
and adopted his proposed rule as the law of the circuit. The Second Circuit held that “a defendant may be held liable under international law for aiding and abetting the violation of that law by another when the defendant (1) provides practical assistance to the principal which has a substantial effect on the perpetration of the crime, and (2) does so with the purpose of facilitating the commission of that crime.”
Talisman,
In drawing a mens rea standard, Judge Katzmann looked to the Rome Statute, pursuant to which the International Criminal Court was created.
9
The Rome Stat
*397
ute of the International Criminal Court imposes aiding and abetting liability on one who aids and abets the commission of a crime only if he does so “[f]or the purpose of facilitating the commission of such a crime.”
Khulumani,
Judge Katzmann acknowledged that there was “some support” for a knowledge standard of aiding and abetting liability in tribunal decisions from the International Criminal Tribunal for the Former Yugoslavia (“ICTY”) and the International Criminal Tribunal for Rwanda (“ICTR”). 10 Id. at 278. Judge Katzmann noted, however, that these decisions “arise out of completely distinct factual contexts and often involve defendants who might have been convicted on alternate theories of liability.” Id. at 278. Further, he noted that “panels of [the ICTY] occasionally (and consciously) engaged in discussions peripheral to the ratio decidendi of a case in order to provide clarification [that] might have some value for the future development of international criminal law.” Id. (internal citations and quotations omitted). Finally, he noted inconsistencies in the application of a knowledge mens rea standard in certain of the tribunals’ prosecutions, citing to one decision that seemed to require that assistance be “specifically directed to assist ... the perpetration of a certain specific crime.” Id. at 278 n. 15 (citing Prosecutor v. Vasiljevic, Case No. IT-98-32-A, Appeals Chamber Judgment, ¶ 102(i) (Int’l Crim. Trib. for the Former Yugoslavia Feb. 25, 2004)). For all these reasons, Judge Katzmann was “unable to find that liability predicated on the [knowledge] definition of aiding and abetting offered in the decisions of the ICTY and ICTR is sufficiently well-established and universally recognized to trigger jurisdiction for a tort suit under the [ATS].” Id. at 279.
The Appellants urge us to reject
Talisman
and instead follow the lead of federal courts that have defined the scope of aiding and abetting liability to reach those who provide “knowing assistance that has a substantial effect on the commission of the human rights violation.”
Doe VIII,
The D.C. Circuit also rejected the Rome Statute as an authoritative source of the proper mens rea standard after concluding that it “is properly viewed in the nature of a treaty and not as customary international law.” Id. at *18. The court specifically cited Article 10 of the Rome Statute, declaring that the Statute “is not to ‘be interpreted as limiting or prejudicing in any way existing or developing rules of international law.’ ” Id. The court also reasoned that, as a treaty, the Rome Statute binds only the countries that have ratified it and noted that the United States has not. Id. Finally, the court cited an International Criminal Court (“ICC”) prosecution in which the ICC recognized that the Rome Statute did not necessarily represent customary international law. Id. (citing Prosecutor v. Gemain Katanga and Mathieu Ngudjolo Chui, Case No. ICC-01/14/01/07, Decision on the Confirmation of Charges, ¶¶ 507-08 (Sept. 30, 2008)).
C.
The district court accepted the Second Circuit’s analysis in Talisman, 11 concluding that where liability hinges on a theory of aiding and abetting the principal actor, a plaintiff'must allege that the defendant acted with the purpose of facilitating the violation of an international norm. Finding that the Amended Complaint failed to plead facts sufficient to establish that Alcolac sold Kromfax to NuKraft with the purpose of facilitating genocide, the district court dismissed the ATS claims.
We are persuaded by the Second Circuit’s
Talisman
analysis and adopt it as the law of this circuit. In that regard, we agree that
Sosa
guides courts to international law to determine the standard for imposing accessorial liability, given Rosa’s command that courts limit liability to “violations of international law with definite content and acceptance among civilized nations equivalent to the historical paradigms familiar when [the ATS] was enacted.”
Talisman,
We recall that the ATS confers jurisdiction over “any civil action by an alien for a tort only, committed in violation of the law of nations or a treaty of the United States.” 28 U.S.C. § 1350. Thus, we must necessarily look to the law of nations to determine the reach of the statute. Our inquiry is complicated, however, by the fact that several sources comprise that law. Indeed, this very phenomenon explains the tension between the conflicting mens rea standards for accessorial liability drawn by our sister circuits.
For example, Article 38(1) of the Statute of the International Court of Justice (“ICJ”), which is annexed to the Charter of the United Nations, describes the various sources of international law that the ICJ is to apply as its authority:
*399 a. international conventions, whether general or particular, establishing rules expressly recognized by the contesting states;
b. international custom, as evidence of a general practice accepted as law;
c. the general principles of law recognized by civilized nations;
d. subject to the provisions of Article 59, judicial decisions and the teachings of the most highly qualified publicists of the various nations, as subsidiary means for the determination of rules of law.
Similarly, section 102 of the Restatement (Third) of Foreign Relations Law lists the sources as follows:
(1) A rule of international law is one that has been accepted as such by the international community of states
(a) in the form of customary law;
(b) by international agreement; or
(c) by derivation from general principles common to the major legal systems of the world.
(2) Customary international law results from a general and consistent practice of states followed by them from a sense of legal obligation.
(3) International agreements create law for the states parties thereto and may lead to the creation of customary international law when such agreements are intended for adherence by states generally and are in fact widely accepted.
(4) General principles common to the major legal systems, even if not incorporated or reflected in customary law or international agreement, may be invoked as supplementary rules of international law where appropriate.
Finally, as the Supreme Court noted in The Paquete Habana:
International law is part of our law, and must be ascertained and administered by the courts of justice of appropriate jurisdiction as often as questions of right depending upon it are duly presented for their determination. For this purpose, where there is no treaty and no controlling executive or legislative act or judicial decision, resort must be had to the customs and usages of civilized nations, and, as evidence of these, to the works of jurists and commentators, who by years of labor, research, and experience have made themselves peculiarly well acquainted with the subjects of which they treat.
With this backdrop in mind, we address the D.C. Circuit’s conclusion that the Rome Statute is “properly viewed in the nature of a treaty and not as customary international law,”
Doe VIII,
We part company, however, with the D.C. Circuit’s decision to decline to give greater weight to the Rome Statute as the authoritative source on the issue before us. While we agree with the premise that the Rome Statute does not constitute customary international law, we find that its status as a treaty cuts in favor of accepting
*400
its mens rea standard as authoritative for purposes of ATS aiding and abetting liability. Again, we are mindful that the Rome Statute “has been signed by 139 countries and ratified by 105, including most of the mature democracies of the world.”
Khulumani,
That the United States has not ratified the Rome Statute, “for reasons unrelated to any concern over the definition of aiding-and-abetting,”
id.
at 276 n. 9, does not undermine its authority here. Although the D.C. Circuit is correct that the Rome Statute is not binding on the United States,
Doe VIII,
Granting the Rome Statute preference over customary international law to resolve the issue before us is particularly appropriate given the latter’s elusive characteristics. As our colleagues on the Seventh Circuit recently explained, the difficulties in applying customary international law are manifest:
The determination of what offenses violate customary international law ... is no simple task. Customary international law is discerned from myriad decisions made in numerous and varied international and domestic arenas. Furthermore, the relevant evidence of customary international law is widely dispersed and generally unfamiliar to lawyers and judges. These difficulties are compounded by the fact that customary international law — as the term itself implies — is created by the general customs and practices of nations and therefore does not stem from any single, definitive, readily-identifiable source. All of these characteristics give the body of customary international law a soft, indeterminate character.
Flomo v. Firestone Natural Rubber Co., LLC,
We conclude that adopting the specific intent mens rea standard for accessorial liability explicitly embodied in the Rome Statute hews as closely as possible to the
Sosa
limits of “requiring] any claim based on the present-day law of nations to rest on a norm of international character accepted by the civilized world and defined with a specificity comparable to the fea
*401
tures of the 18th-century paradigms [the Supreme Court has] recognized.”
Although we acknowledge that aiding and abetting liability has been imposed in international tribunals for knowing con
duct
— see,
e.g.,
Vasiljevic — we find that “no ... consensus exists for imposing liability on [those] who
knowingly
(but not purposefully) aid and abet a violation of international law.”
Talisman,
In sum, keeping in mind the Supreme Court’s admonitions in
Sosa
that we should exercise “great caution” before recognizing causes of action for violations of international law, and that liability should attach only for violations of those international norms that obtain universal acceptance,
D.
Applying that standard here, the Appellants’ sole reference to Aleolac’s intentional conduct in the Amended Complaint is an allegation that Alcolac placed Kromfax “into the stream of international commerce with the purpose of facilitating the use of said chemicals in the manufacture of chemical weapons to be used, among other things, against the Kurdish population in northern Iraq.” J.A. 370 (Am.Compl. ¶ 53). Such a cursory allegation, however, untethered to any supporting facts, constitutes a legal conclusion that neither binds us,
see Robinson v. Am. Honda Motor Co.,
V.
Our decision is not intended to minimize or excuse the horrific acts recounted by the Appellants in their Amended Complaint. Rather, we simply recognize and apply — as we must — the constraints imposed by law as to the scope of relief authorized by the TVPA and the ATS. These constraints compel us to hold that the Appellants have failed to allege viable *402 claims under these statutes. Accordingly, the judgment of the district court is affirmed.
AFFIRMED
Notes
. The Appellants subsequently obtained leave of the district court to file an amended class action complaint (“Amended Complaint”), which is the operative pleading before us. *390 The Appellants have also alleged claims against the Republic of Iraq, but this defendant has never been served and, to date, has not participated in these proceedings.
. The Australia Group included Australia, France, Germany, Italy, Japan, South Korea, the Netherlands, New Zealand, Norway, Romania, the United Kingdom, the United States, and Switzerland.
. In late 1989, Rhone-Poulenc S.A., a French chemical company, acquired Aleolac from Rio Tinto Zinc. Aleolac today is a Georgia (U.S.) corporation owned by Rhodia, Inc., a U.S. subsidiary of Rhodia S.A., a French chemical company.
. Following entry of the district court’s order in this case, the D.C. Circuit and the Ninth Circuit also held that the TVPA imposes liability only on natural persons.
Mohamad v. Rajoub,
. The parties present contradictory views regarding the TVPA’s legislative history. However, because the statutory text is clear, we do not address these arguments.
. On appeal, Alcolac also contends that corporations cannot be sued under the ATS. Alcolac, however, did not press this basis for dismissal in the district court. In the normal course, we do not consider issues raised for the first time on appeal, except in cases where the alleged "error is 'plain' and our refusal to consider it would result in a miscarriage of justice.''
Nat’l Wildlife Fed’n v. Hanson,
. The statute has been amended infrequently since its original enactment. In its original form, the statute provided that the district courts "shall also have cognizance, concurrent with the courts of the several States, or the circuit courts, as the case may be, of all causes where an alien sues for a tort only in violation of the law of nations or a treaty of the United States.” Judiciary Act of 1789, ch. 20, § 9, 1 Stat. 73.
. In
Central Bank,
the Supreme Court rejected aiding and abetting liability under section 10(b) of the Securities Exchange Act of 1934, finding that such liability should be permitted in civil cases only where Congress expressly
*396
authorizes it. The Court held, "[W]hen Congress enacts a statute under which a person may sue and recover damages from a private defendant for the defendant's violation of some statutory norm, there is no general presumption that the plaintiff may also sue aiders and abettors.”
. Recognizing that an international criminal court was the "missing link in the international legal system" to prosecute crimes such as genocide or those of similar gravity, the United Nations General Assembly convened a conference in Rome in June 1998. Rome Statute of the International Criminal Court — Overview, United Nations, http://untreaty.un.org/cod/icc/ general/overview.htm (last visited August 19, 2011). The product of the conference was the Rome Statute, establishing the International Criminal Court to "be a permanent institution ... hav[ing] the power to exercise its jurisdiction over persons for the most serious crimes of international concern, as referred to in this Statute, and [to] be complementary to national criminal jurisdictions.” Rome Statute art. 1.
. The ICTY and ICTR are tribunals established by resolutions of the United Nations Security Council. The ICTY is obliged to "prosecut[e] ... persons responsible for serious violations of international humanitarian law.” S.C. Res. 808, ¶ 1, U.N. SCOR, 48th Sess., U.N. Doc. S/RES/808 (Feb. 22, 1993) ("S.C. Res. 808”). Similarly, the ICTR is mandated to "prosecut[e] persons responsible for genocide and other serious violations of international humanitarian law.” S.C. Res. 955, ¶ 1, U.N. SCOR, 49th Sess., U.N. Doc. S/RES/955 (Nov. 8, 1994). In establishing these tribunals, the Security Council noted that "all parties are bound to comply with the obligations under international humanitarian law,” and that "persons who commit or order the commission of grave breaches of the [Geneva] Conventions are individually responsible in respect of such breaches.” S.C. Res. 808.
. The district court did not have the benefit of the D.C. Circuit’s opinion in Doe VIH.
. In a footnote, the D.C. Circuit highlights an amicus brief filed by David J. Scheffer, who served as U.S. Ambassador-at-Large for War Crimes Issues and head of the U.S. delegation involved in negotiating the Rome Statute.
Doe VIII,
. In
Doe VIII,
the D.C. Circuit noted what it perceived to be an inconsistency in the Rome Statute regarding the relevant mens rea standard.
. Although not dispositive, we note that the Supreme Court chose not to disturb the Second Circuit's specific intent analysis when it declined to accept the parties’ cross-petitions for writ of certiorari in
Talisman. See Presbyterian Church of Sudan v. Talisman Energy,
Inc., - U.S. -,
