Justice Stevens
delivered the opinion of the Court.
Petitioner was convicted of “willfully” dealing in firearms without a federal license. The question presented is whether the term “willfully” in 18 U. S. C. § 924(a)(1)(D) requires proof that the defendant knew that his conduct was unlawful, or whether it also requires proof that he knew of the federal licensing requirement.
I
In-1968 Congress enacted the Omnibus Crime Control and Safe Streets Act. 82 Stat. 197-239. In Title IV of that Act Congress made findings concerning the impact of the traffic in firearms on the prevalence of lawlessness and violent crime in the United States1 and amended the Criminal Code [187] to include detailed provisions regulating the use and sale of firearms. As amended, 18 U. S. C. §922 defined a number of “unlawful acts”; subsection (a)(1) made it unlawful for any person except a licensed dealer to engage in the business of dealing in firearms.2 Section 928 established the federal licensing program and repeated the prohibition against dealing in firearms without a license, and § 924 specified the penalties for violating “any provision of this chapter.” Read literally, § 924 authorized the imposition of a fine of up to $5,000 or a prison sentence of not more than five years, “or both,” on any person who dealt in firearms without a license even if that person believed that he or she was acting lawfully.3 As enacted in 1968, §§ 922(a)(1) and 924 omitted an express scienter requirement and therefore arguably imposed strict criminal liability on every unlicensed dealer in firearms. The 1968 Act also omitted any definition of the term “engaged in the business” even though that conduct was an element of the unlawful act prohibited by § 922(a)(1).
In 1986 Congress enacted the Firearms Owners’ Protection Act (FOPA), in part, to cure these omissions. The findings in that statute explained that additional legislation was necessary to protect law-abiding citizens with respect to the acquisition, possession, or use of firearms for lawful pur[188] poses.4 FOPA therefore amended § 921 to include a definition of the term “engaged in the business,”5 and amended §924 to add a scienter requirement as a condition to the imposition of penalties for most of the unlawful acts defined in § 922. For three categories of offenses the intent required is that the defendant acted “knowingly”; for the fourth category, which includes “any other provision of this chapter,” the required intent is that the defendant acted “willfully.”6 [189] The § 922(a)(1)(A)7 offense at issue in this case is an "other provision” in the “willfully” category.
II
The jury having found petitioner guilty, we accept the Government’s version of the evidence That evidence proved that petitioner did not have a federal license to deal in firearms; that he used so-called “straw purchasers” in Ohio to acquire pistols that he could not have purchased himself; that the straw purchasers made false statements when purchasing the guns; that petitioner assured the straw purchasers that he would file the serial numbers off the guns; and that he resold the guns on Brooklyn street corners known for drug dealing. The evidence was unquestionably adequate to prove that petitioner was dealing in firearms, and that he knew that his conduct was unlawful.8 There was, however, no evidence that he was aware of the federal law that prohibits dealing in firearms without a federal license.
Petitioner was charged with a conspiracy to violate 18 U. S. C. § 922(a)(1)(A), by -willfully engaging in the business of dealing in firearms, and with a substantive violation of that provision.9 After the close of evidence, petitioner requested that the trial judge instruct the jury that petitioner could be convicted only if he knew of the federal [190] licensing requirement,10 but the judge rejected this request. Instead, the trial judge gave this explanation of the term “willfully”:
“A person acts willfully if he acts intentionally and purposely and with the intent to do something the law forbids, that is, with the bad purpose to disobey or to disregard the law. Now, the person need not be aware of the specific law or rule that his conduct may be violating. But he must act with the intent to do something that the law forbids.”11
Petitioner was found guilty on both counts. On appeal he argued that the evidence was insufficient because there was no proof that he had knowledge of the federal licensing requirement, and that the trial judge had erred by failing to instruct the jury that such knowledge was an essential element of the offense. The Court of Appeals affirmed. 122 F. 3d 90 (CA2 1997). It concluded that the instructions were proper and that the Government had elicited “ample proof” that petitioner had acted willfully. App. 22.
Because the Eleventh Circuit has held that it is necessary for the Government to prove that the defendant acted with knowledge of the licensing requirement, United States v. Sanchez-Corcino, 85 F. 3d 549, 553-554 (1996), we granted certiorari to resolve the conflict. 522 U. S. 1024 (1997).
[191] H-i
The word “willfully” is sometimes said to be “a word of many meanings” whose construction is often dependent on the context in which it appears. See, e. g., Spies v. United States, 317 U. S. 492, 497 (1943). Most obviously it differentiates between deliberate and unwitting conduct, but in the criminal law it also typically refers to a culpable state of mind. As we explained in United States v. Murdock, 290 U. S. 389 (1933), a variety of phrases have been used to describe that concept.12 As a general matter, when used in the criminal context, a “willful” act is one undertaken with a “bad purpose.”13 In other words, in order to establish a [192] “willful” violation of a statute, “the Government must prove that the defendant acted with knowledge that his conduct was unlawful.” Ratzlaf v. United States, 510 U. S. 135, 137 (1994).
Petitioner argues that a more particularized showing is required in this case for two principal reasons. First, he argues that the fact that Congress used the adverb “knowingly” to authorize punishment of three categories of acts made unlawful by § 922 and the word “willfully” when it referred to unlicensed dealing in firearms demonstrates that the Government must shoulder a special burden in eases like this. This argument is not persuasive because the term “knowingly” does not necessarily have any reference to a eulpable state of mind or to knowledge of the law. As Justice Jackson correctly observed, “the knowledge requisite to knowing violation of a statute is factual knowledge as distinguished from knowledge of the law.”14 Thus, in United [193] States v. Bailey, 444 U. S. 394 (1980), we held that the prosecution fulfills its burden of proving a knowing violation of the escape statute “if it demonstrates that an escapee knew his actions would result in his leaving physical confinement without permission.” Id., at 408. And in Staples v. United States, 511 U. S. 600 (1994), we held that a charge that the defendant’s possession of an unregistered maehinegun was unlawful required proof “that he knew the weapon he possessed had the characteristics that brought it within the statutory definition of a maehinegun.” Id., at 602. It was not, however, necessary to prove that the defendant knew that his possession was unlawful. See Rogers v. United States, 522 U. S. 252, 254-255 (1998) (plurality opinion). Thus, unless the text of the statute dictates a different result,15 the term “knowingly” merely requires proof of knowledge of the facts that constitute the offense.
With respect to the three categories of conduct that are made punishable by §924 if performed “knowingly,” the background presumption that every citizen knows the law makes it unnecessary to adduce specific evidence to prove that “an evil-meaning mind” directed the “evil-doing hand.”16 More is required, however, with respect to the conduct in the fourth category that is only criminal when done “willfully.” The jury must find that the defendant acted with an evil-meaning mind, that is to say, that he acted with knowledge that his conduct was unlawful.
Petitioner next argues that we must read § 924(a)(1)(D) to require knowledge of the law because of our inter[194] pretation of “willfully” in two other contexts. In certain cases involving willful violations of the tax laws, we have concluded that the jury must find that the defendant was aware of the specific provision of the tax code that he was charged with violating. See, e. g., Cheek v. United States, 498 U. S. 192, 201 (1991).17 Similarly, in order to satisfy a willful violation in Ratzlaf, we concluded that the jury had to find that the defendant knew that his structuring of cash transactions to avoid a reporting requirement was unlawful. See 510 U. S., at 138, 149. Those cases, however, are readily distinguishable. Both the tax cases18 and Ratz-laf19 involved highly technical statutes that presented the danger of ensnaring individuals engaged in apparently innocent conduct.20 As a result, we held that these statutes [195] “earv[e] out an exception to the traditional rule” that ignorance of the law is no excuse21 and require that the defendant have knowledge of the law.22 The danger of convicting individuals engaged in apparently innocent activity that motivated our decisions in the tax cases and Ratzlaf is not present here because the jury found that this petitioner knew that his conduct was unlawful.23
[196] Thus, the willfulness requirement of § 924(a)(1)(D) does not carve out an exception to the traditional rule that ignorance of the law is no excuse; knowledge that the conduct is unlawful is all that is required.
IY
Petitioner advances a number of additional arguments based on his reading of congressional intent. Petitioner first points to the legislative history of FOPA, but that history is too ambiguous to offer petitioner much assistance. Petitioner’s main support lies in statements made by opponents of the bill.24 As we have stated, however, “[t]he fears and doubts of the opposition are no authoritative guide to the construction of legislation.” Schwegmann Brothers v. Calvert Distillers Corp., 341 U. S. 384, 394 (1951). “In their zeal to defeat a bill, they understandably tend to overstate its reach.” NLRB v. Fruit Packers, 377 U. S. 58, 66 (1964).25
Petitioner next ai’gues that, at the time FOPA was passed, the “willfulness” requirements in other subsections of the statute — §§ 923(d)(l)(C)-(D) — had uniformly been interpreted by lower courts to require knowledge of the law; petitioner argues that Congress intended that “willfully” should have the same meaning in § 924(a)(1)(D). As an initial matter, the lower courts had eome to no such agreement. While some courts had stated that willfulness in § 923(d)(1) is satis[197] fied by a disregard of a known legal obligation,26 willful was also interpreted variously to refer to “purposeful, intentional conduct,”27 “indifference] to the requirements of the law,”28 or merely a “conscious, intentional, deliberate, voluntary decision.”29 Moreover, in each of the cases in which disregard of a known legal obligation was held to be sufficient to establish willfulness, it was perfectly clear from the record that the licensee had knowledge of the law;30 thus, while these [198] eases support the notion that disregard of a known legal obligation is sufficient to establish a willful violation, they in no way stand for the proposition that it is required.31
Finally, petitioner argues that § 922(b)(3), which is governed by § 924(a)(l)(D)’s willfulness standard, indicates that Congress intended “willfully” to include knowledge of the law. Section 922(b)(3) prohibits licensees from selling firearms to any person who the licensee knows or has reasonable cause to believe does not reside in the licensee’s State, except where, inter alia, the transaction fully complies with the laws of both the seller’s and buyer’s State. The subsection further states that the licensee “shall be presumed, ... in the absence of evidence to the contrary, to have had actual knowledge of the State laws and published ordinances of both States.”32 Although petitioner argues that the presumption in § 922(b)(3) indicates that Congress intended willfulness to require knowledge of the law for all offenses covered by § 924(a)(1)(D), petitioner is mistaken. As noted above, while disregard of a known legal obligation is cer[199] tainly sufficient to establish a willful violation, it is not necessary — and nothing in § 922(b)(3) contradicts this basic distinction.33
V
One sentence in the trial court’s instructions to the jury, read by itself, contained a misstatement of the law. In a portion of the instructions that were given after the correct statement that we have already quoted, the judge stated: “In this case, the government is not required to prove that the defendant knew that a license was required, nor is the government required to grove that he had knowledge that he was breaking the law” App. 19 (emphasis added). If the judge had added the words “that required a license,” the sentence would have been accurate, but as given it was not.
Nevertheless, that error does not provide a basis for reversal for four reasons. First, petitioner did not object to that sentence, except insofar as he had argued that the jury should have been instructed that the Government had the burden of proving that he had knowledge of the federal licensing requirement. Second, in the context of the entire instructions, it seems unlikely that the jury was misled. See, e. g., United States v. Park, 421 U. S. 658, 674-675 (1975). Third, petitioner failed to raise this argument in the Court of Appeals. Finally, our grant of certiorari was limited to [200] the narrow legal question whether knowledge of the licensing requirement is an essential element of the offense.
Accordingly, the judgment of the Court of Appeals is affirmed.
It is so ordered.
“(1) that there is a widespread traffic in firearms moving in or otherwise affecting interstate or foreign commerce, and that the existing Federal controls over such traffic do not adequately enable the States to control this traffic within their own borders through the exercise of their police power;
“(2) that the ease with which any person can acquire firearms other than a rifle or shotgun (including criminals, juveniles without the knowledge or consent of their parents or guardians, narcotics addicts, mental defectives, armed groups who would supplant the functions of duly constituted- public authorities, and others whose possession of such weapons is similarly contrary to the public interest) is a significant factor in the. prevalence of lawlessness and violent crime in the United States;
“(3) that only through adequate Federal control over interstate and foreign commerce in these weapons, and over all persons engaging in the businesses of importing, manufacturing, or dealing in them, can this grave [187] problem be properly dealt with, and effective State and local regulation of this traffic be made possible ....” 82 Stat. 225.
“(a) It shall be unlawful—
“(1) for any person—
“(A) except a licensed importer, licensed manufacture!’, or licensed dealer, to engage in the business of importing, manufacturing, or dealing in firearms, or in the course of such business to ship, transport, or receive any firearm in interstate or foreign commerce.”
“(21) The term ‘engaged in the business’ means—
“(C) as applied to a dealer in firearms, as defined in section 921 (a)(ll)(A), a person who devotes time, attention, and labor to dealing in firearms as a regular course of trade or business with the principal objective of livelihood and profit through the repetitive purchase and resale of firearms, but such term shall not include a person who makes occasional sales, exchanges, or purchases of firearms for the enhancement of a personal collection or for a hobby, or who sells all or part of his personal collection of firearms ....” 100 Stat. 449-450.
“Except as otherwise provided in this subsection, subsection (b), (c), or (f) of this section, or in section 929, whoever—
“(A) knowingly makes any false statement or representation with respect to the information required by this chapter to be kept in the records of a person licensed under this chapter or in applying for any license or exemption or relief from disability under the provisions of this chapter;
“(B) knowingly violates subsection (a)(4), (f), (k), (r), (v), or (w) of section 922;
[189] "(C) knowingly imports or brings into the United States or any possession thereof any firearm or ammunition in violation of section 922(1); or
"(D) willfully violates any other provision of this chapter,
“shall be fined under this title, imprisoned not more than five years, or both”
“The Federal Firearms Statute which the Defendant is charged with, conspiracy to violate and with allegedly violated [sic], is a specific intent statute. You must accordingly find, beyond a reasonable doubt, that Defendant at all relevant times charged, acted with the knowledge that it was unlawful to engage in the business of firearms distribution lawfully purchased by a legally permissible transferee or gun purchaser.
“[Y]ou must be persuaded that with the actual knowledge of the federal firearms licensing laws Defendant acted in knowing and intentional violation of them.” App. 17 (citing Ratzlaf v. United States, 510 U. S. 135 (1994)).
“I believe that criminal prosecutions for ‘currency law* violations, of the sort at issue here, very much resemble criminal prosecutions for tax law violations. Compare 26 TJ. S. C. §§60501, 7203 with 31 TJ. S. C. §§5322, 5324. Both sets of laws are technical; and both sets of laws sometimes criminalize conduct that would not strike an ordinary citizen as immoral or likely unlawful. Thus, both sets of laws may lead to the unfair result of criminally prosecuting individuals who subjectively and honestly believe they have not acted criminally. Cheek v. United States, 498 U. S. 192 ... (1991), sets forth a legal standard that, by requiring proof that the defendant was subjectively aware of the duty at issue, would avoid such unfair results.” United States v. Aversa, 984 F. 2d 493, 502 (CA1 1993) (concurring opinion).
He therefore concluded that the “same standards should apply in both” the tax eases and in eases such as Ratzlaf. 984 F. 2d, at 503.
“The uncontroverted evidence shows clearly that plaintiff was aware of the above holding period requirements. Mr. Mayesh had been previously advised on the requirements under Illinois law, and he clearly acknowledged that he was aware of them.... Since the material facts are undisputed, as a matter of law the plaintiff clearly and knowingly violated the Illinois holding provisions . . . , and hence, 18 U. S. C. § 922(b)(2). This court can only consider such action to have been ‘wilful’ as a matter of law. There is no basis for trial of any disputed facts in this connection. This is sufficient to justify refusal of license renewal.” 58 F. R. D., at 540. See also, e. g., Perri, 637 F. 2d, at 1336 (stating that when a dealer understands the requirements of the law, but knowingly fails to follow them or is in different to them, willfulness “is established,” i. e., is satisfied); Stein’s, 649 F. 2d, at 468 (“Evidence of repeated violations with knowledge of the law’s requirements has been held sufficient to establish willfulness” (emphasis added)); McLemore, 317 F. Supp., at 1078-1079.