Periodization refers to a process by which historians organize long periods of time into eras based on their similar characteristics. This type of organization serves several purposes. It allows historians to create more manageable categories, which then allow them to study them in a more accessible way. It also allows them to highlight the commonalities and differences of various time periods. Finally, periodization is also a useful way to see how patterns of behaviour and culture have changed through time.
<span> Periodization can help historians know when an event occured. This can also help historians learn the cause and effect of another time in history.</span>
The Second Industrial Revolution affected the North, South, West, and Midwest with changes such as population, transportation, and economy changes. These railroads connected cities and were used to transport natural resources and goods from manufacturers to other places.
