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 HISTIAEUS (d. 494 ), tyrant of Miletus under the Persian king Darius Hystaspis. According to Herodotus he rendered great service to Darius while he was campaigning in Scythia by persuading his fellow-despots not to destroy the bridge over the Danube by which the Persians must return. Choosing his own reward for this service, he became possessor of territory near Myrcinus (afterwards Amphipolis), rich in timber and minerals. The success of his enterprise led to his being invited to Susa, where in the midst of every kind of honour he was virtually a prisoner of Darius, who had reason to dread his growing power in Ionia. During this period the Greek cities were left under native despots supported by Persia, Aristagoras, son-in-law of Histiaeus, being ruler of Miletus in his stead. This prince, having failed against Naxos in a joint expedition with the satrap Artaphernes, began to stir up the Ionians to revolt, and this result was brought to pass, according to Herodotus, by a secret message from Histiaeus. The revolt assumed a formidable character and Histiaeus persuaded Darius that he alone could quell it. He was allowed to leave Susa, but on his arrival at the coast found himself suspected by the satrap, and was ultimately driven to establish himself (Herodotus says as a pirate; more probably in charge of the Bosporus route) at Byzantium. After the total failure of the revolt at the battle of Lade, he made various attempts to re-establish himself, but was captured by the Persian Harpagus and crucified by Artaphernes at Sardis. His head was embalmed and sent to Darius, who gave it honourable burial. The theory of Herodotus that the Ionian revolt was caused by the single message of Histiaeus is incredible; there is evidence to show that the Ionians had been meditating since about 512 a patriotic revolt against the Persian domination and the “tyrants” on whom it rested (see Grote, Hist. of Greece, ed. 1907, especially p. 122 note; art., and authorities; also S. Heinlein in Klio, 1909, pp. 341-351).

 HISTOLOGY (Gr., web, tissue, properly the web-beam of the loom, from  , to make to stand), the science which deals with the structure of the tissues of plants and animals (see ).

 HISTORY. The word “history” is used in two senses. It may mean either the record of events, or events themselves. Originally (see below) limited to inquiry and statement, it was only in comparatively modern times that the meaning of the word was extended to include the phenomena which form or might form their subject. It was perhaps by a somewhat careless transference of ideas that this extension was brought about. Now indeed it is the commoner meaning. We speak of the “history of England” without reference to any literary narrative. We term kings and statesmen the “makers of history,” and sometimes say that the historian only records the history which they make. History in this connexion is obviously not the record, but the thing to be recorded. It is unfortunate that such a double meaning of the word should have grown up, for it is productive of not a little confusion of thought.

History in the wider sense is all that has happened, not merely all the phenomena of human life, but those of the natural world as well. It includes everything that undergoes change; and as modern science has shown that there is nothing absolutely static, therefore the whole universe, and every part of it, has its history. The discovery of ether brought with it a reconstruction of our ideas of the physical universe, transferring the emphasis from the mathematical expression of static relationships to a dynamic conception of a universe in constant transformation; matter in equipoise became energy in gradual readjustment. Solids are solids no longer. The universe is in motion in every particle of every part; rock and metal merely a transition stage between crystallization and dissolution. This idea of universal activity has in a sense made physics itself a branch of history. It is the same with the other sciences—especially the biological division, where the doctrine of evolution has induced an attitude of mind which is distinctly historical.

But the tendency to look at things historically is not merely the attitude of men of science. Our outlook upon life differs in just this particular from that of preceding ages. We recognize the unstable nature of our whole social fabric, and are therefore more and more capable of transforming it. Our institutions are no longer held to be inevitable and immutable creations. We do not attempt to fit them to absolute formulae, but continually adapt them to a changing environment. Even modern architecture, notably in America, reflects the consciousness of change. The permanent character of ancient or medieval buildings was fitted only to a society dominated by static ideals. Now the architect builds, not for all time, but for a set of conditions which will inevitably cease in the not distant future. Thus our whole society not only bears the marks of its evolution, but shows its growing consciousness of the fact in the most evident of its arts. In literature, philosophy and political science, there is the same historical trend. Criticism no longer judges by absolute standards; it applies the standards of the author’s own environment. We no longer condemn Shakespeare for having violated the ancient dramatic laws, nor Voltaire for having objected to the violations. Each age has its own expression, and in judging each we enter the field of history. In ethics, again, the revolt against absolute standards limits us to the relative, and morals are investigated on the basis of history, as largely conditioned by economic environment and the growth of intellectual freedom. Revelation no longer appeals to scientific minds as a source of knowledge. Experience on the other hand is history. As for political science, we do not regard the national state as that ultimate and final product which men once saw in the Roman Empire. It has hardly come into being before forces are evident which aim at its destruction. Internationalism has gained ground in Europe in recent years; and Socialism itself, which is based upon a distinct interpretation of history, is regarded by its followers as merely a stage in human progress, like those which have gone before it. It is evident that Freeman’s definition of history as “past politics” is miserably inadequate. Political events are mere externals. History enters into every phase of activity, and the economic forces which urge society along are as much its subject as the political result.

In short the historical spirit of the age has invaded every field. The world-picture presented in this encyclopaedia is that of a dynamic universe, of phenomena in process of ceaseless change. Owing to this insistent change all things which happen, or seem to happen, are history in the broader sense of the word. The encyclopaedia itself is a history of them in the stricter sense,—the description and record of this universal process. This narrower meaning is the subject of the rest of this article.

The word “history” comes from the Gr. , which was used by the Ionians in the 6th century for the search for knowledge in the widest sense. It meant inquiry, investigation, not narrative. It was not until two centuries later that the historikos, the reciter of stories, superseded the historeōn ( ), the seeker after knowledge. Thus history began as a branch of scientific research,—much the same as what the Athenians later termed philosophy. Herodotus himself was as much a scientific explorer as a reciter of narrative, and his life-long investigation was historiē in his Ionian speech. Yet it was Herodotus himself who first hinted at the new use of the word, applied merely to the details accumulated during a long search for knowledge. It is not until Aristotle, however, that we have it definitely applied to the literary product instead of the inquiry which precedes it. From Aristotle to modern times, history (Lat. historia) has been a form of literature. It is only in the scientific environment of to-day that we recognize once more, with those earliest of the forerunners of Herodotus, that history involves two distinct operations, one of which, investigation, is in the field of science, while the other, the literary presentation, is in the field of art.

The history of history itself is therefore two-fold. History as art flourishes with the arts. It calls upon the imagination and the literary gifts of expression. Its history does not run parallel with the scientific side, but rather varies in inverse ratio with scientific activity. Those periods which have been dominated by the great masters of style have been less interested in the criticism of the historian’s methods of investigation than in the beauty of his rhetoric. The scientific historian, deeply interested