Hallie Liberto holds a PhD in philosophy from the University of Wisconsin, Madison and is currently an associate professor in the philosophy department at the University of Maryland. She writes about the power held by individuals to change the moral, legal, and social world through speech acts and other expressions of our will. Consider, for instance: consent, promises, promissory release, offers, and threats. Much of her work relates to sexual ethics – a subject on which she has taught two classes in University Honors. Professor Liberto has published articles on these topics, most recently including, “Coercion, Consent, and the Mechanistic Question” Ethics, 2021; and “Sexual Consent, Self-Defense, and Epistemic Responsibility” in Applied Epistemology, ed. Jennifer Lackey, Oxford University Press; 2021. She is currently finishing her book, Green Light Ethics: A Theory of Green Light Permissive Consent and its Moral Metaphysics (under contract, Oxford University Press).