Green Light Ethics: A Theory of Permissive Consent and its Moral Metaphysics by Hallie Liberto (review)

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• Green Light Ethics: A Theory of Permissive Consent and its Moral Metaphysics by Hallie Liberto
• Jonathan Ichikawa (bio)

Review of Hallie Liberto, Green Light Ethics: A Theory of Permissive Consent and its Moral Metaphysics (Oxford University Press, 2022)

Hallie Liberto's Green Light Ethics offers a framework for conceptualizing permissive consent. The book is a philosopher's work of philosophy. Although it touches on non-ideal social realities, especially sexism, it is most centrally a contribution to a quite abstract literature in normative ethics, following in the tradition of scholars like David Owens, Heidi Hurd, Alan Wertheimer, and Tom Dougherty—it may have a few too many Φs and abstractions to be accessible to and comfortable for many people outside the analytic philosophical tradition. The central approach to permission and consent is general—not specific to sexual consent—although some discussions are specific to sex.

I have always appreciated and learned from Liberto's work on this topic, and I was excited to read her new book. As I'd hoped, it exhibits fresh and interesting moral and philosophical instincts, and advances plausible and interesting ideas. I did feel, however, that it was sometimes more difficult than one might hope to identify exactly what those ideas are. At key points, I found myself wanting more precision or explanation. I am not the kind of philosopher who shuns abstraction—I value both the concrete/non-ideal and the theoretical/abstract. And I'm not afraid of all those Φs. But as I see it, the point of writing in that mode—the reason it can be worth the cost in accessibility and style—is the ability to express and examine complex ideas with a high degree of precision. As I was reading this book, I found that much of my own intellectual contribution centered around attempts to interpret Liberto's ideas and technicalities before I was in a good position to learn from them. This was a bit of a shame, because there are intriguing ideas in this book, well worthy of consideration. I'll give my own reconstruction of a few of them below, along with some critical engagement.

1. domain authority

Liberto posits that there are certain domains over which people hold a special kind of moral authority, which she calls "domain authority" (38). Someone would wrong you if they acted in your domains outside of your normative control. For example, you have domain authority over sexual contact with your body; any actions by others within that domain must [End Page 429] be in accordance with your moral control, or they are violative. Liberto typically uses the following abbreviations to discuss domain authority: S is a person who may or may not be giving P permission to Φ, which is a potential action that P might perform. Φ here is always an action within D, a particular domain of S's moral authority. Since Φ is within D, Φ would wrong S if P Φ'd without S's appropriate authorization.

In the case of sexual domain rights, D is S's bodily sexual domain; P would wrong S by performing some act Φ within that domain outside of S's authority. (Φ might be sexually penetrating S, for example.) The framework generalizes. D might be my home, and Φ could stand for potential actions within my home for which any S would need my permission: entering it, say, or drilling a hole in the wall. I'll follow Liberto's use for these abbreviations. Note that Φ will always refer to an act within S's domain D.

One of the more distinctive contributions of Liberto's framework is her insistence that subjects retain their domain authority, even as they exercise it to permit action within their domains (42). When S consents to Φ, Liberto says, S does not waive any rights against Φ. If they did, Φ would no longer be part of S's domain of authority D. It is possible to waive rights in this way—this is what happens with property transfers. But Liberto argues that things are quite different for permissive consent (61). If I invite P into my home, or permit P to touch me sexually, they may do so without violating...