The Sahabah (ra) ruled by what Allah (swt) revealed and therefore those who were blessed to live under their rule witnessed the justice that we seek today. For example:
Khilafah: One of the Highest Obligations
It has also been reported on the authority of Abu Said Al-Khudri (ra) that the Messenger of Allah (saw) said:
Hence, he made the unity of the State a vital issue when he prohibited the plurality of the Khulafaa’ and ordered the death penalty for the one who insists on establishing multiple leaders within the Islamic State after being advised against it. It has also been reported on the authority of Arfaja, who said: “I heard the Messenger of Allah (saw) say:
Now that the Islamic State no longer exists, these ahadith indicate the level of priority we must give to ensure that the Ummah is united under the leadership of one Khalifah. We must understand that the unity of the Ummah is a “matter of life and death” and, therefore, we must exert our utmost effort to re-establish the Khilafah Rashidah in the Muslim lands.
We should therefore be motivated by this hadith and the ayah to look forward to the return of the Khilafah as the hope for the Ummah. However, this does not give us the excuse to sit back and wait for the Khilafah. We must instead study and comprehend the method used by the Prophet Muhammad (saw) to establish the Islamic State and follow his method in re-establishing it at this time. Just as RasulAllah (saw) and the Sahabah (ra) worked together in a group to accomplish the goal of establishing an Islamic state, we too must work within an Islamic political group. Allah (swt) revealed: