“It is seen from the first generation that the Sahabah [رضي الله عنهم] rushed to appoint an Imam and pledge allegiance after the death of the Messenger of Allah ﷺ, and they believed that it is an obligation binding upon them and a right that should be fulfilled immediately, and they avoided its postponement which even made them delay preparing the Messenger of Allah ﷺ for burial since they were busy with the appointment of an Imam; all this because they knew that, should there be a moment in which they have no leader that unites them under one opinion and they face a problem, and they differ in the mode of solving it, then their system would be a mess, unity would be nullified and the laws (aḥkām) would cease (to be lived by). It is because of this that they prioritised rushing towards appointing a leader and they did not occupy themselves during this time with anything else other than that. This is decisive (proof) that appointing an Imam is necessary for the preservation of Islam.”
Ma-sha-Allah