What does global climate governance—whose entire history spans no more than 40 years--hold for the next quarter-century? This chapter analyzes the main gaps and challenges of global governance with respect to climate change, situating major landmarks against the backdrop of broader changes in the world order. Global climate governance continues to generate sharp debates about the potential and limitations of state-centric regimes; the role of science and evidence; and the space for civil society, private sector actors, and subnational governments. In addition to achieving greater policy coherence in a fragmented field, the challenges ahead include filling in major gaps relating to topics that have "fallen between the cracks" of climate governance negotiations: namely, those of adaptation, forests, and climate migration.