In criminal law, the doctrines surrounding sexual consent and proximate causation are both thought to reflect conclusions about individual autonomy. But these doctrines diverge in striking ways. In rape law, the choice to consent to sex is deemed sufficiently autonomous even when made in response to threats or coercion, when induced by fraudulent misrepresentations, or when produced by mental impairment. By contrast, the doctrine of proximate causation holds that a choice made in response to force, coercion, fraud, or mental impairment is insufficiently autonomous, and therefore an individual is not morally responsible for any resulting consequences. This divergence invites a crucial question: Does the law of proximate causation capture something important about individual autonomy that has been overlooked in the law of sexual consent? After all, sexual consent frequently plays a causal role in normatively desirable sexual encounters. Yet the structure of U.S. rape law elides any inquiry into causation. Might rape law be improved—might it better protect individual autonomy—by demanding that sexual consent be a proximate cause of sex itself?
This Article is the first to raise this question and undertake this inquiry. By juxtaposing consent and causation in criminal jurisprudence, it reveals an inconsistency in the understandings of autonomy that motivate those doctrines, shedding new light on longstanding criticisms of rape law. This Article then makes a preliminary case for reforming rape law by recasting sexual consent as a matter of proximate causation. It offers three grounds for doing so: First, philosophical accounts of sexual autonomy require an individual to be able to control the character and circumstances of sexual contact, a requirement that is only vindicated when consent causally contributes to sexual activity. Second, the best understanding of consent’s exonerating role in sex is that consent alters another person’s reasons for acting, a function that can only occur when consent causally motivates sexual behavior. Lastly, the leading accounts of when sex is normatively desirable rest on a conception of mutuality—that is, responsiveness to the other person’s active consent. In short, this Article advances the novel claim that sexual activity is normatively desirable when it occurs because it is consented to, not merely whenever it is consented to.
The Article concludes by considering how rape laws may be reformed to leverage the normative insights just uncovered. It first examines the recent revisions to the sexual assault provisions of the Model Penal Code adopted by the American Law Institute in 2022. Those revisions, for the first time, included both requirements of causation and requirements of nonconsent. But the Model Penal Code’s revisions hew too closely to traditional rape laws, ultimately failing to capture the broad spectrum of normatively undesirable sex that warrants criminalization. The Article instead reconfigures rape as primarily a result crime, prohibiting specific wrongful means of causing sexual intercourse and exonerating sex when consent is the proximate cause. A rape law structured around the causes of sexual intercourse may best capture our normative intuitions about why and when consent matters.
Introduction
Consent is the primary legal mechanism used by the criminal law—rape law, in particular—to safeguard sexual autonomy.1 1.See, e.g., Stuart P. Green, Criminalizing Sex: A Unified Liberal Theory 25 (2020); see also Alan Wertheimer, Consent to Sexual Relations 31 (2003) (“In effect, autonomy refers to the value that is to be protected, whereas consent refers to the means for protecting and promoting that value: we protect a person’s autonomy by prohibiting actions to which she does not consent and empowering her to engage in actions to which she does consent.” (emphasis omitted)); Luis E. Chiesa, Solving the Riddle of Rape-by-Deception, 35 Yale L. & Pol’y Rev. 407, 419 (2017) (“[C]onsent is the tool that law most commonly deploys in order to operationalize conceptions of freedom and autonomy.”); Patricia J. Falk, Rape by Drugs: A Statutory Overview and Proposals for Reform, 44 Ariz. L. Rev. 131, 187 (2002) (“As many commentators have observed, the central value protected by sexual offense provisions is sexual autonomy or sexual integrity, the violation of which represents a unique, not readily comparable, type of harm to the victim.” (footnotes omitted)).Show More However, American rape law has long been criticized for advancing a conception of consent that survives common means of subverting autonomy.2 2.See, e.g., Patricia J. Falk, Rape by Fraud and Rape by Coercion, 64 Brook. L. Rev. 39, 162–68, 173–77 (1998) (detailing scholarly criticisms of rape law’s treatment of sexual fraud and sexual coercion); see also Stephen J. Schulhofer, Unwanted Sex: The Culture of Intimidation and the Failure of Law 114–36 (1998) (critiquing rape law’s treatment of coercive situations as consensual).Show More Judges and juries have found valid consent to sexual intercourse in the face of deadly threats,3 3.See infra Subsection I.C.1.Show More psychological coercion,4 4.See infra Subsection I.C.1.Show More material fraud,5 5.See infra Subsection I.C.2.Show More intoxication,6 6.Coley v. State, 616 So. 2d 1017, 1023 (Fla. Dist. Ct. App. 1993) (“The prevailing view is that voluntary consumption of drugs or alcohol does not, without more, render consent involuntary.”); State v. Sherrill, No. 71,253, 1995 WL 18253106, at *3–4 (Kan. Ct. App. June 9, 1995) (finding insufficient evidence that the complainant could not consent despite her testimony that “she had consumed a considerable amount of alcoholic liquor”). See generally infra Subsection I.C.3.Show More and mental impairment.7 7.See infra Subsection I.C.3.Show More As Catharine MacKinnon has documented, “Consent as a legal standard in the law of sexual assault commonly exonerates sexual interactions that are one-sided, nonmutual, unwanted, nonvoluntary, nonreciprocal, constrained, compelled, and coerced.”8 8.Catharine A. MacKinnon, Rape Redefined, 10 Harv. L. & Pol’y Rev. 431, 443 (2016).Show More
In another corner of criminal law, threats, coercion, fraud, intoxication, and impairment are thought to so significantly undermine autonomy that a person affected by them is deemed irresponsible—both morally and legally—for resulting consequences.9 9.See infra Section II.B.Show More This is the law of proximate causation. Under a causation analysis, the criminal law rigorously interrogates whether a person’s actions are sufficiently autonomous to render that person blameworthy for consequences that follow.10 10.See, e.g., Eric A. Johnson, Trust and the Limits of Trust: Rethinking the Doctrine of Novus Actus Interveniens, 2025 U. Ill. L. Rev. 743, 751–55; Guyora Binder & Luis Chiesa, The Puzzle of Inciting Suicide, 56 Am. Crim. L. Rev. 65, 99 (2019).Show More When a person’s actions are not autonomous, it is often because their autonomy was infringed by some earlier-in-time blameworthy conduct by another, who now carries moral and legal responsibility.11 11.See Michael S. Moore, The Metaphysics of Causal Intervention, 88 Calif. L. Rev. 827, 836 (2000) (“[I]f the defendant coercively supplies the motive for the intervenor’s behavior, then that behavior does not break the causal chain between defendant’s action and the harm.”).Show More
Juxtaposing consent and causation thus reveals a tension in the criminal law’s depictions of individual autonomy—a tension that goes to the heart of what it means to bear moral and legal responsibility for sex. When the law asks whether someone is responsible for an act of sexual intercourse, it is best understood as asking a question about causation. After all, both legal and moral responsibility for an event typically follow from an inquiry into who caused the event to occur.12 12.See Binder & Chiesa, supra note 10, at 70 (explaining that causation in criminal law is “little more than a normative attribution of responsibility for a result”).Show More But when the law concludes that someone consented to an act of sexual intercourse, it also seemingly asserts something about that individual’s moral and legal responsibility. An individual who consents to sex is expected to bear the consequences of that act of consent, for better or worse, without complaint.13 13.See, e.g., Heidi M. Hurd, The Moral Magic of Consent, 2 Legal Theory 121, 123 (1996) (“[C]onsent defeats any rights on the part of others (including the person consenting) that the actor not do the wrong act.”).Show More Moreover, because consent operates to absolve other parties from legal responsibility for a sexual act, consent seemingly intervenes in the attribution of responsibility.14 14.See id. at 124 (“Whether it functions as a ‘moral transformative’ or as a ‘stained permission,’ consent derives its normative power from the fact that it alters the obligations and permissions that collectively determine the rightness of others’ actions.”).Show More
These conclusions about moral and legal responsibility for sex are unproblematic when sex goes right. In paradigmatic consensual sexual interactions, sex presumptively happens because there was a prior act of consent. Thus, the law’s conclusions about causal responsibility and its conclusions about consensual responsibility should align.
But when sex goes wrong—when consent is tainted by external factors, including force, coercion, fraud, intoxication, and mental impairment—the criminal law’s causal conclusions diverge sharply from its conclusions about the validity of sexual consent. Consider the situation where sexual consent is fraudulently induced, such as when a doctor tells a patient that sexual intercourse is a necessary component of medical treatment.15 15.See, e.g., Boro v. Superior Ct., 210 Cal. Rptr. 122, 123 (Ct. App. 1985) (defendant posed as a doctor and convinced the victim that she needed to have sex with an anonymous donor in order to treat “a dangerous, highly infectious and perhaps fatal disease”).Show More The criminal law’s causation doctrine would hold that the doctor, rather than the patient, should bear moral and legal responsibility for causing the sex.16 16.See infra Subsection II.C.2.Show More But the criminal law’s consent doctrine would hold that the consent is valid and enforceable,17 17.See infra Subsection I.C.2.Show More rendering the sex noncriminal, and leaving the victim to bear the weight of any experienced harm.
Viewing sexual consent as one act in a chain of actions that results in sexual intercourse reveals a limitation in the structure of U.S. rape law. The typical rape statute in the United States makes sexual nonconsent an attendant circumstance—an extraneous fact that is not causally connected to the essential conduct with which the defendant stands accused.18 18.The traditional common law definition of rape was “carnal knowledge of a woman forcibly and against her will.” 4 William Blackstone, Commentaries *210. In this formulation, still relevant in roughly half of U.S. states, MacKinnon, supra note 8, at 437 & n.26, the element that the intercourse be nonconsensual (or “against her will”) is an attendant circumstance, see, e.g., Susan Estrich, Rape, 95 Yale L.J. 1087, 1121 n.101 (1986). Attendant circumstances “refer to the objective situation that the law requires to exist, in addition to the defendant’s act or any results that the act may cause.” Model Penal Code § 5.01 cmt. at 301 n.9 (A.L.I., Official Draft and Revised Comments 1985).Show More Because of this structural choice, sexual consent renders sexual intercourse noncriminal whenever it is present. External factors that bear on moral responsibility—force, coercion, fraud, and impairment among them—have little doctrinal significance in defining a particular sexual interaction as rape because causation is left out of the picture.19 19.See infra Section I.C.Show More
This revelation invites two further questions, one normative and one doctrinal. Normatively, ought we demand that consent play a causal role in sexual interactions if it is to exonerate them? Stated differently, is the mere presence of legally valid consent morally transformative? Or is sex normatively desirable only when legally valid consent causes subsequent sexual acts? Assigning a causal role to sexual consent seemingly ensures that criminality maps onto our ordinary intuitions about who bears responsibility for a result. If rape law—like criminal law more generally—seeks to track moral responsibility (hence blameworthiness),20 20.Although there are of course varied justifications for the criminal law, many leading theorists agree that blameworthiness is or ought to be the centerpiece of our criminal system. See, e.g., Douglas Husak, “Broad” Culpability and the Retributivist Dream, 9 Ohio St. J. Crim. L. 449, 449 (2012); Michael Moore, Placing Blame: A General Theory of the Criminal Law 153–54 (1997); Larry Alexander & Kimberly Kessler Ferzan with Stephen Morse, Crime and Culpability: A Theory of Criminal Law 66–67 (2009).Show More there are at least provisional arguments that causation should be required.21 21.See infra Section III.A.Show More
Doctrinally, contrasting consent and causation invites inquiry into how to structure rape statutes to ensure that consent is causally efficacious. I have been down this road once before, postulating that a rape law modeled on human trafficking laws might profitably incorporate a causation requirement.22 22.Ben A. McJunkin, Rape as Indignity, 109 Corn. L. Rev. 385, 447 (2024).Show More The recent reforms to the Model Penal Code also hint in this direction. Under the model language adopted at the 2022 annual meeting, at least some sexual assaults would require that sexual intercourse be caused by the defendant’s use of force, deception, or extortion (and therefore not caused by the complainant’s consent).23 23.See Model Penal Code §§ 213.1–213.2, 213.4–213.5 (A.L.I., Tentative Draft No. 6, 2022).Show More However, the model language ultimately continues the trend of centering the presence and validity of consent, rather than its causal role in the encounter. Taking consent’s causal role in sexual relations seriously would thus require revisions to rape law that go beyond the new Model Penal Code.
This Article proceeds in three Parts. Part I examines the current role of consent in U.S. rape law and its ostensible commitment to protecting individual sexual autonomy. This Part catalogues how consent has been found to be present and valid even in the face of threats, coercion, fraud, or mental impairment. Part II examines the doctrines of proximate and intervening causation, exploring these doctrines’ philosophical grounding in individual autonomy. In contrast to Part I, this Part catalogues how threats, coercion, fraud, and mental impairment interrupt causation precisely because they so impair autonomy as to absolve individuals of moral and legal responsibility. In light of this juxtaposition, Part III constructs a normative argument that a proper understanding of autonomy requires that consent play a causal role in sexual intercourse if intercourse is to be normatively desirable. It then explores the consequences of this argument for rape law reformers: rape should not be understood as sex in the absence of consent, but rather as causing sex through specified, prohibited means other than consent, allowing sexual consent’s doctrinal role to track its normative one.
- See, e.g., Stuart P. Green, Criminalizing Sex: A Unified Liberal Theory 25 (2020); see also Alan Wertheimer, Consent to Sexual Relations 31 (2003) (“In effect, autonomy refers to the value that is to be protected, whereas consent refers to the means for protecting and promoting that value: we protect a person’s autonomy by prohibiting actions to which she does not consent and empowering her to engage in actions to which she does consent.” (emphasis omitted)); Luis E. Chiesa, Solving the Riddle of Rape-by-Deception, 35 Yale L. & Pol’y Rev. 407, 419 (2017) (“[C]onsent is the tool that law most commonly deploys in order to operationalize conceptions of freedom and autonomy.”); Patricia J. Falk, Rape by Drugs: A Statutory Overview and Proposals for Reform, 44 Ariz. L. Rev. 131, 187 (2002) (“As many commentators have observed, the central value protected by sexual offense provisions is sexual autonomy or sexual integrity, the violation of which represents a unique, not readily comparable, type of harm to the victim.” (footnotes omitted)). ↑
- See, e.g., Patricia J. Falk, Rape by Fraud and Rape by Coercion, 64 Brook. L. Rev. 39, 162–68, 173–77 (1998) (detailing scholarly criticisms of rape law’s treatment of sexual fraud and sexual coercion); see also Stephen J. Schulhofer, Unwanted Sex: The Culture of Intimidation and the Failure of Law 114–36 (1998) (critiquing rape law’s treatment of coercive situations as consensual). ↑
- See infra Subsection I.C.1. ↑
- See infra Subsection I.C.1. ↑
- See infra Subsection I.C.2. ↑
- Coley v. State, 616 So. 2d 1017, 1023 (Fla. Dist. Ct. App. 1993) (“The prevailing view is that voluntary consumption of drugs or alcohol does not, without more, render consent involuntary.”); State v. Sherrill, No. 71,253, 1995 WL 18253106, at *3–4 (Kan. Ct. App. June 9, 1995) (finding insufficient evidence that the complainant could not consent despite her testimony that “she had consumed a considerable amount of alcoholic liquor”). See generally infra Subsection I.C.3. ↑
- See infra Subsection I.C.3. ↑
- Catharine A. MacKinnon, Rape Redefined, 10 Harv. L. & Pol’y Rev. 431, 443 (2016). ↑
- See infra Section II.B. ↑
- See, e.g., Eric A. Johnson, Trust and the Limits of Trust: Rethinking the Doctrine of Novus Actus Interveniens, 2025 U. Ill. L. Rev. 743, 751–55; Guyora Binder & Luis Chiesa, The Puzzle of Inciting Suicide, 56 Am. Crim. L. Rev. 65, 99 (2019). ↑
- See Michael S. Moore, The Metaphysics of Causal Intervention, 88 Calif. L. Rev. 827, 836 (2000) (“[I]f the defendant coercively supplies the motive for the intervenor’s behavior, then that behavior does not break the causal chain between defendant’s action and the harm.”). ↑
- See Binder & Chiesa, supra note 10, at 70 (explaining that causation in criminal law is “little more than a normative attribution of responsibility for a result”). ↑
- See, e.g., Heidi M. Hurd, The Moral Magic of Consent, 2 Legal Theory 121, 123 (1996) (“[C]onsent defeats any rights on the part of others (including the person consenting) that the actor not do the wrong act.”). ↑
- See id. at 124 (“Whether it functions as a ‘moral transformative’ or as a ‘stained permission,’ consent derives its normative power from the fact that it alters the obligations and permissions that collectively determine the rightness of others’ actions.”). ↑
- See, e.g., Boro v. Superior Ct., 210 Cal. Rptr. 122, 123 (Ct. App. 1985) (defendant posed as a doctor and convinced the victim that she needed to have sex with an anonymous donor in order to treat “a dangerous, highly infectious and perhaps fatal disease”). ↑
- See infra Subsection II.C.2. ↑
- See infra Subsection I.C.2. ↑
- The traditional common law definition of rape was “carnal knowledge of a woman forcibly and against her will.” 4 William Blackstone, Commentaries *210. In this formulation, still relevant in roughly half of U.S. states, MacKinnon, supra note 8, at 437 & n.26, the element that the intercourse be nonconsensual (or “against her will”) is an attendant circumstance, see, e.g., Susan Estrich, Rape, 95 Yale L.J. 1087, 1121 n.101 (1986). Attendant circumstances “refer to the objective situation that the law requires to exist, in addition to the defendant’s act or any results that the act may cause.” Model Penal Code § 5.01 cmt. at 301 n.9 (A.L.I., Official Draft and Revised Comments 1985). ↑
- See infra Section I.C. ↑
- Although there are of course varied justifications for the criminal law, many leading theorists agree that blameworthiness is or ought to be the centerpiece of our criminal system. See, e.g., Douglas Husak, “Broad” Culpability and the Retributivist Dream, 9 Ohio St. J. Crim. L. 449, 449 (2012); Michael Moore, Placing Blame: A General Theory of the Criminal Law 153–54 (1997); Larry Alexander & Kimberly Kessler Ferzan with Stephen Morse, Crime and Culpability: A Theory of Criminal Law 66–67 (2009). ↑
- See infra Section III.A. ↑
- Ben A. McJunkin, Rape as Indignity, 109 Corn. L. Rev. 385, 447 (2024). ↑
-
See Model Penal Code §§ 213.1–213.2, 213.4–213.5 (A.L.I., Tentative Draft No. 6, 2022). ↑