What is Imamate (Leadership) called? The Fourth Pillar of Usool-e-Deen in Shia Islam

Fourth Usool-e-Deen or Usul-e-Deen of Shia Islam

Imamate (Leadership): The fourth basic pillar of the Usool-e-Deen is Imamate (Leadership) in Shia Islam. We call those whom Allah’s last prophet, Hazrat Muhammad ﷺ, appointed as his successor and leader of the nation Imams. Because guidance is the responsibility of Allah Hazrat Muhammad (PBUH) was the last prophet of Allah, and no prophet was to come after him. Therefore, the Imamate line began; the Imamate chain consisted of 12 Imams. The first was Imam Hazrat Ali (A.S.), and the last current Alive Imam is Imam Mehdi (A.S.). The last Imam Hazrat Muhammad Mahdi (A.S.), who is still alive and is in the veil of absence by the command of Allah, will come when this world is filled with injustice, and he will come and fill this world with justice. As a Muslim, every person must have firm faith in the first Imam Hazrat Ali (A.S.) to the last Imam Hazrat Muhammad Mahdi (A.S.) since belief in Imamate is part of the religion of Islam.