A top UN official has criticised lack of global urgency as reports confirm the world’s largest humanitarian crisis is worsening Efforts to end Sudan’s catastrophic war have been criticised as “unacceptable” by the country’s top UN official as a series of new reports confirm that the world’s biggest humanitarian crisis is worsening. Speaking to the Guardian on the eve of the third anniversary of the war, Denise Brown expressed her concern over the apparent lack of political urgency to end a c...