Polybius

Histories is important not only for being the only Hellenistic historical work to survive in any substantial form, but also for its analysis of constitutional change and the mixed constitution. Discussion of the separation of powers in government, of checks and balances to limit power, and his introduction of "the people", all influenced Montesquieu's The Spirit of the Laws, John Locke's Two Treatises of Government, and the framers of the United States Constitution. A close friend and mentor to the Roman politician and general Scipio Aemilianus (also called Scipio Africanus the Younger), and had a lasting influence on his decision-making and life.

• Name — Polybius • Born — c. 200 BC • Birthplace — Megalopolis, Arcadia • Died — c. 118 BC (aged approx. 82) • Place of death — Roman Greece • Occupation — Historian • Notable Works — The Histories (events of the Roman Republic, 220–146 BC) • Main Interests — History, philosophy of history • Notable Ideas — Anacyclosis

Polybius was born around 200 BC in Megalopolis, Arcadia, when it was an active member of the Achaean League. The town was revived, along with other Achaean states, a century before he was born. His father, Lycortas, was a prominent, land-owning politician and member of the governing class who became strategos (commanding general) of the Achaean League. Consequently, Polybius was able to observe first-hand during his first 30 years the political and military affairs of Megalopolis, gaining experience as a statesman. In his early years, he accompanied his father while travelling as ambassador. He developed interests in equestrianism and hunting, diversions that later commended him to his Roman captors. In 182 he was given the honour of carrying the funeral urn of Philopoemen, one of the most eminent Achaean politicians of his generation. In 170 or 169 Polybius was elected hipparchus (cavalry officer) and was due to assist Rome militarily during the Third Macedonian War, although this never came about. This office was the second-highest position of the Achaean League and often presaged election to the annual strategia (chief generalship). Polybius's political career was cut short in 168, however; as a consequence of the final defeat of the Antigonid dynasty in the Third Macedonian War, 1,000 Achaeans (including Polybius) with suspect allegiances were interned in Rome and its surrounding area.

Polybius's father, Lycortas, was a prominent advocate of neutrality during the Roman war against Perseus of Macedon in 171–168. Lycortas attracted the suspicion of the Romans, and Polybius subsequently was one of the 1,000 Achaean nobles who were transported to Rome as hostages in 167, and was detained there for 17 years. In Rome, by virtue of his high culture, Polybius was admitted to the most distinguished houses, in particular to that of Lucius Aemilius Paullus Macedonicus, the conqueror in the Third Macedonian War, who entrusted Polybius with the education of his sons, Fabius and Scipio Aemilianus (who had been adopted by the eldest son of Scipio Africanus). Polybius remained on cordial terms with his former pupil Scipio Aemilianus and was among the members of the Scipionic Circle. When Scipio defeated the Carthaginians in the Third Punic War, Polybius remained his counsellor. The Achaean hostages were released in 150, and Polybius was granted leave to return home, but the next year he went on campaign with Scipio Aemilianus to Africa, and was present at the Sack of Carthage in 146, which he later described. Following the destruction of Carthage, Polybius likely journeyed along the Atlantic coast of Africa, as well as Spain. After the destruction of Corinth in the same year, Polybius returned to Greece, making use of his Roman connections to lighten the conditions there. Polybius was charged with the difficult task of organizing the new form of government in the Greek cities, and in this office he gained great recognition.

In the succeeding years, Polybius resided in Rome, completing his historical work while occasionally undertaking long journeys through the Mediterranean countries in the furtherance of his history, in particular with the aim of obtaining firsthand knowledge of historical sites. He apparently interviewed veterans to clarify details of the events he was recording and was similarly given access to archival material. Little is known of Polybius's later life; he most likely accompanied Scipio to Spain, acting as his military advisor during the Numantine War. He later wrote about this war in a lost monograph. Polybius probably returned to Greece later in his life, as evidenced by the many existent inscriptions and statues of him there. The last event mentioned in his Histories seems to be the construction of the Via Domitia in southern France in 118 BC, which suggests the writings of Pseudo-Lucian may have some grounding in fact when they state, "[Polybius] fell from his horse while riding up from the country, fell ill as a result and died at the age of eighty-two".

The Histories is a universal history which describes and explains the rise of the Roman Republic as a global power in the ancient Mediterranean world. The work documents in detail political and military affairs across the Hellenistic Mediterranean between 264 and 146 BC, and in its later books includes eyewitness accounts of the sack of Carthage and Corinth in 146 BC, and the Roman annexation of mainland Greece after the Achaean War. While Polybius's Histories covers the period from 264 BC to 146 BC, it focuses mainly on the years 221 to 146, detailing Rome's rise to supremacy in the Mediterranean by overcoming their geopolitical rivals: ancient Carthage, Macedonia, and the Seleucid Empire. Books I-II are The Histories introduction, describing events in Italy and Greece before 221/0 BC, including the First Punic War, Rome's wars with the Gauls, the rise of the Achaean League (Polybius's own constitution), and the re-establishment of Macedonian power in Greece under Antigonus III Doson and Philip V of Macedon. Books III-XXXIX describe in detail political and military affairs in the leading Mediterranean states, including affairs in ancient Rome and ancient Carthage, ancient Greece, and the Seleucid Empire and Egypt, explaining their increasing "συμπλοκή" (symplokē) or interconnectedness and how they each contributed to Rome's rise to dominance. Only books I-V survive in full; the rest are in varying states of fragmentation. Three discursive books on politics, historiography and geography break up the historical narrative: • In Book VI Polybius outlines his famous theory of the "cycle of constitutions" (the anacyclosis) and describes the political, military, and moral institutions that allowed the Romans to defeat their rivals in the Mediterranean. Polybius concludes that the Romans are the pre-eminent power because they currently have customs and institutions which balance and check the negative impulses of their people and promote a deep desire for noble acts, a love of virtue, piety towards parents and elders, and a fear of the gods (deisidaimonia). • In Book XII Polybius discusses how to write history and criticises the historical accounts of numerous previous historians, including Timaeus for his account of the same period of history. He asserts Timaeus's point of view is inaccurate, invalid, and biased in favour of Rome. Christian Habicht considered his criticism of Timaeus to be spiteful and biased, However, Polybius's Histories is also useful in analyzing the different Hellenistic versions of history and of use as a more credible illustration of events during the Hellenistic period. • Book XXXIV discusses geographical matters and the importance of geography in a historical account and in a statesman's education. This book is almost entirely lost.

Polybius wrote several works, most of which are lost. His earliest work was a biography of the Greek statesman Philopoemen; this work was later used as a source by Plutarch when composing his Parallel Lives; however, the original Polybian text is lost. In addition, Polybius wrote an extensive treatise entitled Tactics, which may have detailed Roman and Greek military tactics. Small parts of this work may survive in his major Histories, but the work itself is lost as well. Another missing work was a historical monograph on the events of the Numantine War. The largest Polybian work was his Histories, of which only the first five books survive entirely intact, along with a large portion of the sixth book and fragments of the rest. Along with Cato the Elder (234–149 BC), he can be considered one of the founding fathers of Roman historiography. Livy made reference to and uses Polybius's Histories as source material in his own narrative. Polybius was among the first historians to attempt to present history as a sequence of causes and effects, based upon a careful examination and criticism of tradition. He narrated his history based upon first-hand knowledge. The Histories capture the varied elements of the story of human behaviour: nationalism, xenophobia, duplicitous politics, war, brutality, loyalty, valour, intelligence, reason and resourcefulness. Aside from the narrative of the historical events, Polybius also included three books of digressions. Book 34 was entirely devoted to questions of geography and included some trenchant criticisms of Eratosthenes, whom he accused of passing on popular preconceptions or laodogmatika. Book 12 was a disquisition on the writing of history, citing extensive passages of lost historians, such as Callisthenes and Theopompus. Most influential was Book 6, which describes Roman political, military, and moral institutions, which he considered key to Rome's success; it presented Rome as having a mixed constitution in which monarchical, aristocratic and popular elements existed in stable equilibrium. This enabled Rome to escape, for the time being, the cycle of eternal revolutions (anacyclosis) faced by those with singular constitutions (i.e. many of the Greeks and the Macedonians). While Polybius was not the first to advance this view, his account provides the most cogent illustration of the ideal for later political theorists. A key theme of the Histories is good leadership, and Polybius dedicates considerable time to outlining how the good statesman should be rational, knowledgeable, virtuous and composed. The character of the Polybian statesman is exemplified in that of Philip II of Macedon, who Polybius believed exhibited both excellent military prowess and skill, as well as proficient ability in diplomacy and moral leadership. His beliefs about Philip's character led Polybius to reject the historian Theopompus' description of Philip's private, drunken debauchery. For Polybius, it was inconceivable that such an able and effective statesman could have had an immoral and unrestrained private life as described by Theopompus. The consequences of bad leadership are also highlighted throughout the Histories. Polybius saw, for instance, the character and leadership of the later Philip V of Macedon, one of Rome's leading adversaries in the Greek East, as the opposite of his earlier exemplary namesake. Philip V became increasingly tyrannical, irrational and impious following brilliant military and political success in his youth; this resulted, Polybius believed, in his abandonment by his Greek allies and his eventual defeat by Rome in 197 BC. Other important themes running throughout the Histories include the role of fortune in the affairs of nations, how a leader might weather bravely these changes of fortune with dignity, the educational value of history and how it should demonstrate cause and effect (or apodeiktike) to provide lessons for statesmen, and that historians should be "men of action" to gain appropriate experience so as to understand how political and military affairs are likely to pan out (pragmatikoi). Polybius is considered by some to be the successor of Thucydides in terms of objectivity and critical reasoning, and the forefather of scholarly, painstaking historical research in the modern scientific sense. According to this view, his work sets forth the course of history's occurrences with clearness, penetration, sound judgement, and, among the circumstances affecting the outcomes, he lays special emphasis on geographical conditions. Modern historians are especially impressed with the manner in which Polybius used his sources, particularly documentary evidence, as well as his citation and quotation of sources. Furthermore, there is some admiration for Polybius's meditation on the nature of historiography in Book 12. His work belongs, therefore, amongst the greatest productions of ancient historical writing. The writer of The Oxford Companion to Classical Literature (1937) praises him for his "earnest devotion to truth" and his systematic pursuit of causation. As a hostage in Rome, then as client to the Scipios, and after 146 a collaborator with Roman rule, Polybius was probably in no position to freely express any negative opinions of Rome. The historian Peter Green advises that Polybius was chronicling Roman history for a Greek audience, to justify what he believed to be the inevitability of Roman rule. Nonetheless, Green considers Polybius's Histories the best source for the era they cover. For Ronald J. Mellor, Polybius was a loyal partisan of Scipio, intent on vilifying his patron's opponents. Adrian Goldsworthy, while using Polybius as a source for Scipio's generalship, notes Polybius's underlying and overt bias in Scipio's favour. H. Ormerod considers that Polybius cannot be regarded as an 'altogether unprejudiced witness' in relation to his bêtes noires; the Aetolians, the Carthaginians and the Cretans. Other historians perceive considerable negative bias in Polybius's account of Crete; on the other hand, Hansen notes that the same work, along with passages from Strabo and Scylax of Caryanda, proved a reliable guide in the eventual rediscovery of the lost city of Kydonia.

Polybius was responsible for a useful tool in telegraphy that allowed letters to be easily signaled using a numerical system, called "the Polybius square," mentioned in Hist. X.45.6 ff.. This idea also lends itself to cryptographic manipulation and steganography. Modern implementations of the Polybius square, at least in Western European languages such as English, Spanish, French, German and Italian, generally use the Roman alphabet in which those languages are written. However, Polybius himself was writing in Greek, and would have implemented his cipher square in the Greek alphabet. Both versions are shown here. • 1 — 2 — 3 — 4 — 5 • 1 — A — B — C — D — E • 2 — F — G — H — I/J — K • 3 — L — M — N — O — P • 4 — Q — R — S — T — U • 5 — V — W — X — Y — Z • 1 — 2 — 3 — 4 — 5 • 1 — A — B — Γ — Δ — E • 2 — Z — H — Θ — I — K • 3 — Λ — M — N — Ξ — O • 4 — Π — P — Σ — T — Y • 5 — Φ — X — Ψ — Ω In the Polybius square, letters of the alphabet were arranged left to right, top to bottom in a 5 × 5 square. When used with the 26-letter Latin alphabet two letters, usually I and J, are combined. When used with the Greek alphabet, which has exactly one fewer letters than there are spaces (or code points) in the square, the final "5,5" code point encodes the spaces in between words. Alternatively, it can denote the end of a sentence or paragraph when writing in continuous script. Five numbers are then aligned on the outside top of the square, and five numbers on the left side of the square vertically. Usually these numbers were arranged 1 through 5. By cross-referencing the two numbers along the grid of the square, a letter could be deduced. In the Histories, Polybius specifies how this cypher could be used in fire signals, where long-range messages could be sent by means of torches raised and lowered to signify the column and row of each letter. This was a great leap forward from previous fire signalling, which could send prearranged codes only (such as, 'if we light the fire, it means that the enemy has arrived'). Other writings of scientific interest include detailed discussions of the machines Archimedes created for the defence of Syracuse against the Romans, where Polybius praises the 'old man' and his engineering in the highest terms, and an analysis of the usefulness of astronomy to generals (both in the Histories).

Polybius holds that historians should, if possible, only chronicle events whose participants the historian was able to interview, and was among the first to champion the notion of factual integrity in historical writing. He championed this by interviewing participants of the Second Punic War for the third volume of Histories, including some who knew Hannibal, a major Carthaginian participant. In the twelfth volume of his Histories he defines the historian's job as the analysis of documentation, the review of relevant geographical information, and political experience. In Polybius's time, the profession of a historian required political experience (which aided in differentiating between fact and fiction) and familiarity with the geography surrounding one's subject matter to supply an accurate version of events. Polybius himself exemplified these principles as he was well-travelled and possessed political and military experience. He consulted and used written sources providing essential material for the period between 264 and 220, including, for instance, treaty documents between Rome and Carthage in the First Punic War, the history of the third-century Greek historian Phylarchus, and the Memoirs of the Achaean politician, Aratus of Sicyon. When addressing events after 220, he continued to examine treaty documents, the writings of Greek and Roman historians and statesmen, eye-witness accounts and Macedonian court informants to acquire credible sources of information, although rarely did he name his sources.

• Livy, History of Rome XXI–XLV. • Pseudo-Lucian, Macrobii. • Paulus Orosius, book VII of History Against the Pagans.

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