The scale and complexity of 21st-century risks—ranging from climate collapse and biodiversity loss to digital sovereignty and AI alignment—require governance mechanisms that extend beyond national jurisdictions. Existing treaties are often fragmented, reactive, or sector-specific. This question invites legal scholars, diplomats, and policy architects to explore what kinds of treaty innovations are needed to govern planetary-scale risks. Contributions may address multilateral enforcement mechanisms, systemic foresight clauses, intergenerational rights, loss and damage provisions, and the legal design of supranational observability and accountability protocols.