Herodotus has provided a lot of information concerning the nature of the world and the status of the sciences during his lifetime. He was arguably the first historian, and certainly the first to methodically travel around the known world in order to write with more accuracy, although this still involved second and third hand accounts relating to his primary subject: the Persian wars.
For example, he reports that the annual flooding of the
Nile was said to be the result of melting snows far to the south, and comments that he cannot understand how there can be snow in Africa, the hottest part of the known world, offering an elaborate explanation based on the way that desert winds affect the passage of the Sun over this part of the world (2:18ff).
(He also passes on dismissive reports from
Phoenician sailors that, while circumnavigating
Africa, they 'saw the sun on the right side while sailing westwards'. Thanks to this brief mention, which is almost an afterthought, it has been argued that Africa was indeed circumnavigated by ancient seafarers—for this is precisely where the sun ought to have been.)
Written between 431 BC and 425 BC,
The Histories were divided by later editors into nine books, named after the nine
Muses (the 'Muse of History',
Clio, represented the first book).
As the work progresses, it becomes apparent that Herodotus is fulfilling his opening desire—to 'prevent the great and wonderful actions of the Greeks and the Barbarians from losing their due mead of glory; and to put on record what causes first brought them into conflict.' Indeed, it is only from this perspective that his opening discussion of ancient wife-stealing is comprehensible: he is attempting to discover who first made the 'west' and the 'east' mutual antagonists, and myth is the only source he can delve into for information on the subject.
The first six books deal broadly with the growth of the
Persian Empire. The tale begins with an account of the first 'western' monarch to enter into conflict with an 'eastern' people—
Croesus of
Lydia attacked the Greek
city-states of Ionia, and then (misinterpreting a cryptic oracle), also attacked the Persians. (As occurs many times throughout
The Histories to those who disregard good advice, Croesus soon lost his kingdom, and nearly his life). Croesus was defeated by
Cyrus the Great, founder of the Persian Empire, and Lydia became a Persian province.
The second book forms a lengthy digression concerning the history of Egypt, which Cyrus' successor, Cambyses, annexed to the Empire. The following four books deal with the further growth of the Empire under Darius, the Ionian Revolt, and the burning of Sardis (an act participated in by Athens and at least one other Greek polis). The sixth book describes the very first Persian incursion into Greece, an attack upon those who aided the Ionians and a quest for retribution following the attack upon Sardis, which ended with the defeat of the Persians in 490 BC at the battle of
Marathon, near Athens.
The last three books describe the attempt of the Persian king
Xerxes to avenge the Persian defeat at Marathon and to finally absorb Greece into the Empire.
The Histories end in the year 479 BC, with the Persian invaders having suffered both a crushing naval defeat at
Salamis, and near annihilation of their ground forces at
Plataea. The Persian Empire thus receded to the
Aegean coastline of
Asia Minor, still threatening but much chastened.
It is possible to see the dialectic theme of Persian power and its various excesses running like a 'red thread' throughout the narrative—
cause and effect,
hubris and
fate,
vengeance and
violence. Even the strange and fantastic tales that are liberally sprinkled throughout the text find their source in this momentum. At every stage, a Persian monarch crosses a body of water or other liminal space and suffers the consequences: Cyrus attacks the Massagetae on the eastern bank of a river, and ends up decapitated; Cambyses attacks the Ethiopians to the south of Egypt, across the desert, and goes mad; Darius attacks the Scythians to the north and is flung back across the Danube; Xerxes lashes and then bridges the Hellespont, and his forces are crushed by the Greeks. Thus, though he strays (and sometimes strays rather far) off of this main course, he always returns to the task at hand—answering the question, how and why did the Greeks and Persians enter into the greatest conflict then known, and what were the consequences?