H.g. Wells 
The Rise and Collapse of the Roman Empire [EPUB ebook] 

IT is now necessary to take up the history of the two great republics of the Western Mediterranean, Rome and Carthage, and to tell how Rome succeeded in maintaining for some centuries an empire even greater than that achieved by the conquests of Alexander. But this new empire was, as we shall try to make clear, a political structure differing very profoundly in its nature from any of the great Oriental empires that had preceded it. Great changes in the texture of human society and in the conditions of social interrelations had been going on for some centuries. The flexibility and transferability of money was becoming a power and, like all powers in inexpert hands, a danger in human affairs. It was altering the relations of rich men to the state and to their poorer fellow citizens. This new empire, the Roman empire, unlike all the preceding empires, was not the creation of a great conqueror. No Sargon, no Thothmes, no Nebuchadnezzar, no Cyrus nor Alexander nor Chandragupta, was its fountain head. It was made by a republic. It grew by a kind of necessity through new concentrating and unifying forces that were steadily gathering power in human affairs.
But first it is necessary to give some idea of the state of affairs in Italy in the centuries immediately preceding the appearance of Rome in the world’s story…