The G20 is a real reason for optimism. Not only the scale and range of the communiqué, but the agreement to meet again in the autumn. As I said yesterday, crucial for the future of global governance is the steady thickening of relationships between the political and administrative elites of different nations. The G20 leaders know they will be held to account individually and collectively if yesterday’s impressive words have not started to turn into action by the time they meet again. And, after a few days rest, the ‘sherpas,’ whose job it is to do the pre-negotiation ahead of the summit, will be back at work.