This is established for the reason that the current leader...

This is established for the reason that the current leader, Imam, caliph or president, disregarding legality or the way by which he had come to power, is the actual custodian and supervisor of the nation and, in addition, he is the only one who has full acquaintance of the convenience of the state he is ruling. Therefore, he is the most familiar with the future of his state.

People, consequently, should accede and trust the one he is to appoint in the same amount of confidence they had already provided for the previous. This procedure was jurisprudentially called the nation's congruity. It was, first, processed by Abu­Bakr when he appointed Omar as his successor. The same was processed by Omar when he founded the six­member advisory board.[7] The heir apparent was enacted as a law. Origin of this process was Abu­Bakr's nominating Omar, and the Sahaba's showing no…