Erich Auerbach parses the structure of history and legend and points out why writing history is such a messy, challenging job. From “Odysseus’ Scar,” the first chapter of his epic work of literary criticism Mimesis—
Homer remains within the legendary with all his material, whereas the material of the Old Testament comes closer and closer to history as the narrative proceeds; in the stories of David the historical report predominates. Here too, much that is legendary still remains, as for example the story of David and Goliath; but much—and the most essential—consists in things which the narrators knew from their own experience or from firsthand testimony. Now the difference between legend and history is in most cases easily perceived by a reasonably experienced reader. It is a difficult matter, requiring careful historical and philological training, to distinguish the true from the synthetic or the biased in a historical presentation; but it is easy to separate the historical from the legendary in general. Their structure is different. Even where the legendary does not immediately betray itself by elements of the miraculous, by the repetition of well-known standard motives, typical patterns and themes, through neglect of clear details of time and place, and the like, it is generally quickly recognizable by its composition. It runs far too smoothly. All cross-currents, all friction, all that is casual, secondary to the main events and themes, everything unresolved, truncated, and uncertain, which confuses the clear progress of the action and the simple orientation of the actors, has disappeared. The historical event which we witness, or learn from the testimony of those who witnessed it, runs much more variously, contradictorily, and confusedly; not until it has produced results in a definite domain are we able, with their help, to classify it to a certain extent; and how often the order to which we think we have attained becomes doubtful again, how often we ask ourselves if the data before us have not led us to a far too simple classification of the original events! Legend arranges its material in a simple and straightforward way; it detaches it from its contemporary historical context, so that the latter will not confuse it; it knows only clearly outlined men who act from few and simple motives and the continuity of whose feelings and actions remains uninterrupted. In the legends of martyrs, for example, a stiff-necked and fanatical persecutor stands over against an equally stiff-necked and fanatical victim; and a situation so complicated—that is to say, so real and historical—as that in which the “persecutor” Pliny finds himself in his celebrated letter to Trajan on the subject of the Christians, is unfit for legend. And that is still a comparatively simple case. Let the reader think of the history which we are ourselves witnessing; anyone who, for example, evaluates the behavior of individual men and groups of men at the time of the rise of National Socialism in Germany, or the behavior of individual peoples and states before and during the last war, will feel how difficult it is to represent historical themes in general, and how unfit they are for legend; the historical comprises a great number of contradictory motives in each individual, a hesitation and ambiguous groping on the part of groups; only seldom (as in the last war) does a more or less plain situation, comparatively simple to describe, arise, and even such a situation is subject to division below the surface, is indeed almost constantly in danger of losing its simplicity; and the motives of all the interested parties are so complex that the slogans of propaganda can be composed only through the crudest simplification—with the result that friend and foe alike can often employ the same ones. To write history is so difficult that most historians are forced to make concessions to the technique of legend.