Hazrat Mahdi (as) will call people to the Qur'an and teach them that true justice can be obtained by observing the rights of all parties

"WHEN THEY WANT TO APPLY THEIR DESIRES AGAINST SALVATION, HE (HAZRAT MAHDI (AS)) WILL WISH TO IMPLEMENT SALVATION IN THE FACE OF THEIR DESIRE. IF THEY WISH TO FAVOR THEIR OPINIONS OVER THE QUR’AN, HE WILL APPLY THE QUR’AN OVER THEIR OPINIONS . ...WHEN WAR SPREADS ON ALL SIDES AND RISES AND INTENSIFIES,... THE COMMANDER (HAZRAT MAHDI (AS)) WILL CALL THOSE OF THEM WHO DO EVIL TO ACCOUNT; THE EARTH WILL GIVE FORTH WHATEVER IT CONTAINS LIKE GOLD AND SILVER AND WILL OFFER IT TO THEIR TREASURIES. AND HE (HAZRAT MAHDI (AS)) WILL SHOW THEM HOW HE ADMINISTERS JUSTICE; AND HE WILL RESTORE LIFE ONCE MORE TO THE QUR’AN AND THE SUNNAH. ...(Nahj al-Balagha, 138rd Sermon)

In the End Times, which our Prophet (saas) described in full detail 1400 years ago, in other words, in the century we are living in now, the great majority of people will tend to live lives filled with worldly desires, heedless of Allah and religious moral values. As an excuse for choosing such a life style they will maintain that social conditions and the life of this world impose such a choice upon them. The fact is, however, that when he appears, Hazrat Mahdi (as) will call on these people to abide by the Qur’an, to sincerely live by Qur’anic moral values and to follow the Sunnah of our Prophet (saas). For these reasons, people’s spiritual natures will be greatly strengthened in the time of Hazrat Mahdi (as), and the result will be a society of devout individuals who believe in Allah and the Day of Reckoning and in all the prophets and who perform all their religious obligations for Allah’s approval. People all over the world will live by the moral values of the Qur’an and the Sunnah of our Prophet (saas), as they did in the time of the Messenger of Allah (saas).

Economic power will also rise enormously in the time of Hazrat Mahdi (as), and production, livestock raising, agriculture, industry and mining will all reach the very highest levels. There will be huge advances across the world in the field of mining in particular, and gold and silver reserved and the products manufactures from them will also reach an optimal level.

One noteworthy practice in the time of Hazrat Mahdi (as) will be how justice is administered in a manner completely compatible with the moral values of the Qur’an. Hazrat Mahdi (as) will be a spiritual leader who rules over people with justice. He will therefore teach people what form justice that is compatible with the Qur’an should take and how it should be applied, and he will personally make that conception of justice a reality. Hazrat Mahdi (as) will not administer justice from a one-sided perspective, but will show how true justice should be applied. He will teach people the need to establish a justice system based on affection, compassion and initiative. He will show how justice compatible with the Qur’an and god conscience can only come about with rationality and humility, by using the profound affection, compassion and power of love in his own soul to ensure reconciliation among people.