Though people do not talk much in the media about this large figure in Islamic prophecy, Al Mahdi, privately all people had talked about him both in Islamic world and in the west. Reading through the islamic prophecy he is described as a messianic figure and a just leader. He is not only good for the repressed and poor Muslims, he is also good for the west and for the complicated international world affairs. For the reasons I will list below he would be a savior to the world:
1- Being a messianic figure he will work for justice, democracy and prosperity everywhere.
2- He will achieve justice and prosperity after the earth was filled with injustice and oppression.
3- He is very likely to achieve his goals through peace, though having big force behind him will help him achieve this goal as usually happens with world affairs.
4- He is very likely to be a politician and not a military leader.
5- He will never force non-Muslims to be Muslims or discriminate against them. Though unfortunately, some of Christians in the beginning for wrong interpretation of their religion will consider him the Anti-Christ.
6- He is very likely will be able to stop all terror/Jihad that was produced by the injustice and the oppression of the Muslims by their leaders and the west who delightfully was helping them. When I was in my country there was a friend of mine who was working in an American base and he was told not to tell other Egyptians. The base was to protect the rotten regime in Egypt. 7- He is very likely to stop promptly the Israeli-Palestinian fights and solve the conflict.
8- His main job is to get the world ready for Jesus second coming, who will be the Lord (not God) of our world. Al Mahdi is the government guy.
9- He is very likely to be very humble which will help him to get a lot of good people to help in establishing this righteous world that God sent him for. He is very likely was oppressed and had a lot of personal injustices since his function is to fill the earth with justice.
10- He is very likely will be able to get Muslims and non Muslims to accept a new non-confrontational existence and prevent the clash of civilizations.
11- He is very likely to get the non-Muslims particularly Christians to abide with the good of their religion instead of waiting for God's Wrath. Jonah's the prophet was expecting God Wrath to affect his people, but when they repented God's compassion took over his wrath. This is the best time now to study both the bible and Quran. Satan will not send a messenger with a book to ask people to have morals. Islam fought in the past against oppression and against very envious and evil people. Islam did not invent war and Christianity did not end it.
Unfortunately, Al Mahdi for a reason unknown for us will be elevated by God in one night. It sounds strange, but who would think with a hit of a a rod prophet Moses (PBUH) would have opened a highway in the sea or Christ would have resurrected the dead. He would not just show his large forehead and a mark in his face to have people believe him. Some people are expected miracles from him while others believe his miracle is accomplishing his mission. He is very likely to need an overwhelming evidence anyway. Like all reasonable politicians one have to think both geopolitically and economically in figuring the international relations and preventing terrorism. Morality and not self interest should be the objective goal in world affairs, if we think we are doing God's work in earth.