You could write your paragraph about the fact that Hammurabi’s code shows evidence of laws. Or the fact that this implies currency or some sort of trade. This also heavily implies a class system which I feel would be easy to write about.
Technically, yes, it is true that the development of the middle class signaled a decline in the importance of nobility, since people were able to have more economic freedom.
<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>
