President George W. Bush’s withdrawal from the Kyoto Protocol (KP) brought transatlantic differences over climate change to the front pages. Climate change since then has become the symbol of an underlying transatlantic rift with respect to a wider range of global challenges. The disagreement on climate between the traditional partners has been difficult to understand ever since negotiations on the United Nations Framework Convention on Climate Change (UNFCCC) started. It carries dangerous implications for both sides and the globe as a whole. What is needed now is true leadership on both sides of the Atlantic to overcome the divide. Could this momentum be generated, it might set free a positive impetus for other fields of global governance.