rise of Christianity was favoured by the decline of the empire. Throughout the third century AD the empire had been beset by internal divisions – indeed, for periods it was ruled by rivalemperors – and assaulted from outside its borders by Goths and Persians. At times the empire had seemed on the verge of collapse, until it was rescued once more by an able emperor or army commander. In the east, the Parthian Empire was replaced in AD 224 by that of the Sassanids from west Persia, who claimed descent from the great dynasty of Cyrus and Darius. The Sassanian Empire lasted for four centuries, in which it was almost constantly at war with the rival great power in the west. Shapar I, the second Sassanid ruler, took the title of ‘King of Kings of Iran and non-Iran’, thus emphasizing his claim to dominion of the world.
In AD 330, on the ancient site of Byzantium on the Bosporus where Europe meets Asia, Constantine founded the city that bore his name. Constantinople became the capital of the eastern half of the Roman Empire – still formally united – and, as the centre of power and wealth shifted eastwards, Constantinople overtook Rome in magnificence. Half a century later, on the death of the Emperor Theodosius, the empire was divided between his two sons. The Christian, Hellenic–oriental Byzantine Empire was born. While the western half of the empire collapsed under the weight of barbarian invasions, Byzantium continued to rule the Balkans, Asia Minor, Syria, Palestine and Egypt.
The eastern Roman Empire was able to maintain control over the Middle East region for three centuries. The greatest threat it faced was not from Goths and Germans in Europe but from the aggressive and expansionist Sassanian Persians to the east. However, for at least two hundred years the Byzantines were able to secure peace with the Persians through diplomacy. It was only when Justinian the Great (527–65) decided to devote his energies to the reconquest of the western Roman provinces and the reuniting of the empire – efforts which were partially and temporarily successful – that the Persian danger increased. Between 534 and 628 the Persians repeatedly invaded and occupied Syria and had to be thrown back. In 616 they conquered both Egypt and Asia Minor and laid siege to Constantinople. By the time the Emperor Heraclius defeated the Persians and restored the empire’s frontiers, Byzantium andPersia, although still the two superpowers of the ancient world, were overstretched and weakened. Meanwhile, in AD 570 or 571, in obscure and impoverished Arabia an extraordinary man had been born who would plant the seeds of a new and much greater power that would come to overwhelm them. The Prophet Muhammad, who was born in Mecca, one of the largest settled and trading communities in western Arabia, was a man of genius and inspiration who helped to transform the history of mankind – a fact which is acknowledged not only by the one-fifth of the human race who subscribe to the faith that he founded.
There are two aspects of the Islamic religion which are of special importance to the subsequent history of the Middle East. The first of these is that while Muslims do not believe Muhammad to be divine – for Islam is the most fiercely monotheistic of faiths, adhering to the belief that ‘there is no God but God’ – they do regard him as the last of God’s messengers, or the seal of the prophets, who include Moses and Jesus. They therefore hold that Islam is the ultimate faith, which completes and perfects the two other heavenly religions – Judaism and Christianity. If mankind as a whole has not yet accepted the truth, it is due to the failings of the community of Muslim believers.
The other important fact is that, while Muslims believe in paradise and the soul’s immortality, their faith is far from other-worldly. The Prophet, unlike Jesus, was a political leader and organizer of genius, and in Islam there is no separation between religion