Legal scholar Annabel Brett explores the idea of "moral possibility"—the boundary between what laws demand and what people can realistically or ethically be expected to do. Drawing from early modern thinkers like Aquinas, Suarez, and Hobbes, Brett shows how moral impossibility has long shaped debates about legal obligation, resistance, and political agency. Commentators Melissa Lane and David Dyzenhaus join the discussion, examining how this concept applies to everything from climate action and military conscription to unjust regimes and democratic norms. Together, they highlight how institutions, customs, and time shape the space between legal duty and human capacity—and why recognizing this gap is vital to both justice and legitimacy. Recorded on 04/24/2025. (#40431)