Authority and its impact on the most powerful rulers of Islamic empires

After a constant control and conflict between the Roman Empire and the Persian Empire that lasted for hundreds of years, new powers rose on the land of the Middle East, this power was able in a very record time to control many lands of the Persian state and also the Roman state to the extent that the new power was able to completely eliminate the Persian Empire, and indeed the new state founded by the Prophet Muhammad from Medina was able to expand and rise to the extent that it extended from Spain in the west to the borders of China in the east, the foundations that Developed by the Prophet Muhammad and the rules on which the state was built, which was initially based on a religious basis, but with time the Muslim caliphs did not abide by this matter, and as a result of the control of these caliphs on the land that was under the control of the Persians and Romans, the Muslim caliphs began to imitate these princes and rulers, whether in the way of wearing or even living in palaces and indulging in a life of fun and luxury, which led with time to the loss of some of the values that the Muslim caliphs inherited from the Prophet Muhammad, and it seemed Replaced by the love of money and power to the extent that some Muslim rulers have reached the occurrence of strife and conflicts between some rulers for power and this made Islamic countries enter into long periods of wars, conflicts and strikes as a result of the struggle between Muslim rulers for power and we will review in this book the most prominent periods of conflicts and wars between Muslim rulers throughout the Islamic ages.