Being an Iraqi, I would have given 5 stars but gave 3 nonetheless because the city of Baghdad simply wasn't portrayed correctly. Overall, having Wagner Moura (Pablo Escobar) playing the role of Sérgio Vieira de Mello was a great choice.
The role of diplomacy in reducing human costs during times of war is vital. As shown at the end of the movie.
If the attack had not have happened and the UN mission was not pulled out, the world would have been very different today as many would suggest that the UN sits idle without helping people or nations. Thus, We need to support the organisation's diplomatic missions if we wanted to see better outcomes of diplomacy.