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Historians of today and those of the past base their writings on many factors, one unfortunately is a bias they may or may not be aware of. One thing is a certainty, all historians have a cultural background that differs in many ways from one another. Clearly there will be different views of various past events depending on a variety of factors. Historians of today's Russia will have different views of the history of the Soviet Union, depending upon their political bias or lack of them. The ordinary person, one without a political or cultural bias will now as in the past, believe the "history" that best suits themselves. Of course, there is no consensus of how people of any particular period of time, viewed history. There are too many variables, too many different peoples, too many different time periods. What is clear today as it has always been, historians have written different versions of the same periods of time and events. There can be no proven way to determine if recent historians have changed the way people view history. This is true if only based on intellectual thought. There can be no "proof" for lack of a better term that anything has changed because the historians of today have the same views, accurate or inaccurate today as in the past. Any historian or student of history will agree to that,.
The three periods of Roman history were the monarchy, the republic and the principate. They were divided this way by the types of government in those periods.
Chronological Thinking
The Old Stone Age, the Stone Age, and the Prehestoric Age
History can be divided into many periods in many different ways, depending on what you are interested in and on how wide or narrow a focus you apply. For example, you could define history (and pre-history) as the stone age, the copper age, the bronze age, the iron age, and the steel age; or you could define it as ancient, middle ages, renaissance, and modern. Or you could focus on a region, such as the Americas, and define periods as Pre-Columbian, colonial, post-colonial and modern. Or you could focus on one country and look at periods specific to the history of that country. For England, for example, they might include the pre-Roman period, the Roman period, the Saxon period, the Plantagenet dynasty, the Tudor Period, the Stuart period, the Victorian age, or several other overlapping designations.
Probably because it helps to easily identify different time periods in history that hadsimilar events taking place.
That is the only way they can record radical changes that separate periods.
To make it easier to study
The periods used to divide world history by historians are the Middle Ages, Late Middle Ages, Dark Ages, Stone Age, Iron Age, Bronze Age, pre-war, post-war, and many others to mark events, prehistory, and notable periods.
Historians do this because it is their job. There are historians who specialise in the history of Rome, just as there are historians who specialise in the history of other peoples and other historical periods. They study all aspects of Roman history, not just the assemblies and the senate. The study of these two institution is part of getting an understanding of Roman politics and society.
Periods
Most issues are based in similarity. Some long periods of history in various places see little change in things like technology, culture, demographics and hence are difficult to be divided into historical periods.
Historians divide ancient Egypt's history into three periods: the Old Kingdom, the Middle Kingdom, and the New Kingdom.
Historians divide ancient Egypt's history into three periods: the Old Kingdom, the Middle Kingdom, and the New Kingdom.
Christian historians have had a major impact on how the world divides time into periods. (APEX)
Historians of today and those of the past base their writings on many factors, one unfortunately is a bias they may or may not be aware of. One thing is a certainty, all historians have a cultural background that differs in many ways from one another. Clearly there will be different views of various past events depending on a variety of factors. Historians of today's Russia will have different views of the history of the Soviet Union, depending upon their political bias or lack of them. The ordinary person, one without a political or cultural bias will now as in the past, believe the "history" that best suits themselves. Of course, there is no consensus of how people of any particular period of time, viewed history. There are too many variables, too many different peoples, too many different time periods. What is clear today as it has always been, historians have written different versions of the same periods of time and events. There can be no proven way to determine if recent historians have changed the way people view history. This is true if only based on intellectual thought. There can be no "proof" for lack of a better term that anything has changed because the historians of today have the same views, accurate or inaccurate today as in the past. Any historian or student of history will agree to that,.
Similar events and trends often take place in different places during the same periods.