This is a sworn treaty made between us, Hannibal … and Xenophanes the Athenian … in the presence of all the gods who possess Macedonia and the rest o… - Polybius

In the past you rivalled the Achaians and the Macedonians, peoples of your own race, and Philip, their commander, for the hegemony and glory, but now that the freedom of the Hellenes is at stake at a war against an alien people (Romans), ...And does it worth to ally with the barbarians, to take the field with them against the Epeirotans, the Achaians, the Akarnanians, the Boiotians, the Thessalians, in fact with almost all the Hellenes with the exception of the Aitolians who are a wicked nation... ...So Lakedaimonians it is good to remember your ancestors,... be afraid of the Romans... and do ally yourselves with the Achaians and Macedonians. But if some the most powerful citizens are opposed to this policy at least stay neutral and do not side with the unjust.

How striking and grand is the spectacle presented by the period with which I purpose to deal, will be most clearly apparent if we set beside and compare with the Roman dominion the most famous empires of the past, those which have formed the chief theme of historians. Those worthy of being thus set beside it and compared are these. The Persians for a certain period possessed a great rule and dominion, but so often as they ventured to overstep the boundaries of Asia they imperilled not only the security of this empire, but their own existence. The Lacedaemonians, after having for many years disputed the hegemony of Greece, at length attained it but to hold it uncontested for scarce twelve years. The Macedonian rule in Europe extended but from the Adriatic region to the Danube, which would appear a quite insignificant portion of the continent. Subsequently, by overthrowing the Persian empire they became supreme in Asia also. But though their empire was now regarded as the greatest geographically and politically that had ever existed, they left the larger part of the inhabited world as yet outside it. For they never even made a single attempt to dispute possession of Sicily, Sardinia, or Libya, and the most warlike nations of Western Europe were, to speak the simple truth, unknown to them. But the Romans have subjected to their rule not portions, but nearly the whole of the world and possess an empire which is not only immeasurably greater than any which preceded it, but need not fear rivalry in the future. In the course of this work it will become more clearly intelligible by what steps this power was acquired, and it will also be seen how many and how great advantages accrue to the student from the systematic treatment of history.

The date from which I propose to begin my history is the 140th Olympiad [220 - 216 B.C.], and the events are the following: (1) in Greece the so‑called Social War, the first waged against the Aetolians by the Achaeans in league with and under the leadership of Philip of Macedon, the son of Demetrius and father of Perseus, (2) in Asia the war for Coele-Syria between Antiochus and Ptolemy Philopator, (3) in Italy, Libya, and the adjacent regions, the war between Rome and Carthage, usually known as the Hannibalic War. These events immediately succeed those related at the end of the work of Aratus of Sicyon. Previously the doings of the world had been, so to say, dispersed, as they were held together by no unity of initiative, results, or locality; but ever since this date history has been an organic whole, and the affairs of Italy and Libya have been interlinked with those of Greece and Asia, all leading up to one end. And this is my reason for beginning their systematic history from that date.