3. Explain why there is no one accepted convention for periodization. 4. How do historians analyze and categorize thousands of years of history?
5. What are the themes used by historians to analyze societies in a given period of time?

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3. Because many historical periods are difficult to categorize due to the lack of concrete documentation about them.

4. the analysis and categorization of historical periods is done through the study of documents and relics that provide data on certain historical periods, so that the evidence and events and historical situations can be categorized in each period.

5. The themes change between each society, but they are all focused on common elements of the whole civilization as elements focused on religious themes, commerce, and social structuring.

Explanation:

Periodization is a process carried out by historians and professionals linked to this science. This study allows the past to be divided into blocks that are categorized, named and quantified. The purpose of this is to facilitate historical studies and make the past more defined and clear.

Many historical periods lack documentation that can reveal accurate information about the survey, which makes the end and beginning of each period extremely difficult to determine. This generates a certain inaccuracy that prevents a convention for periodization.

However, these periods are often determined by factors of society formed by themes around the religion of civilizations, as well as trade and socio-governmental relations.