very well said, brother Naqvi, Jazak Allah. Obviously, there should be a person from the desendeds of prophet Muhammad (PBUH) as a leader. For sure, he is Imam-e-Zamana (a.t.f.s.). All the Durood we recite goes to him first for his family.
Irrespective of their sects, Muslims throughout the world believe that, "When Imam Mahdi (a.t.f.s.) will establish his government, peace, brotherhood, equality, justice and equity will spread to every nook and corner of the world.