Hisham Ibn Salim narrates that Imam Sadiq said:
“HAZRAT MAHDI (AS) WILL NOT APPEAR UNTIL ALL SECTIONS OF THE PEOPLE HAVE ASSUMED POWER.” Thus nobody will say “IF WE WERE IN POWER AND HAD FORMED A GOVERNMENT WE WOULD HAVE BEHAVED JUSTLY.”
(Bihar al-Anwar, Vol. 52, p. 244)
Before the appearance of Hazrat Mahdi (as), various people from all sections of the society in which he lives will have assumed power, but they will have failed to establish the justice, peace, ease and security that people are looking for. But with Hazrat Mahdi (as), the religion of Allah and the moral values of the Qur’an will rule the entire world. Following the appearance of Hazrat Mahdi (as), nobody will be able to claim, “If we had assumed power and formed a government we would have behaved justly.” By Allah’s leave, Hazrat Mahdi (as) will rule with the moral values of the Qur’an and the Sunna of our Prophet (saas), by means of which the justice, peace and spirit of love and compassioned bestowed by religious moral values will rule the world.