That was his goal two years ago when he first took the podium at the UN's headquarters on New York's East River, confidently predicting that what had eluded countless US presidents before him would be achieved within two years.
Obama had it easy then. After eight years of George W Bush, who ignored the UN in launching the Iraq war and was consistently withering in his assessment of the institution's usefulness, the world was very ready for Barack Obama. As Stewart Patrick of the Council of Foreign Relations has written, Obama promised a "new era of engagement" and "had his audience