Answer:
Popularity, social class, architecture
Explanation:
The ancient Egyptians thought pharoahs as gods themselves, similar to how many adore celebrities today. The Egyptians had a social class system related to money. The sandstone bricks used to make the pyramids and the sphinx are all exactly the same size, and to this day archaeologists couldn't figure out how they are the same size and shape.
In general, the purpose of a nonfiction writer is to "inform", although of course it is quite possible for such a writer to entertain at the same time, since information can often be quite entertaining.
Answer: Yes, I do believe that their relationship has been affected by the Civil war. The reason being as how Helen's father, Captain, is so used to indulging Helen's inappropriate behavior, that when Annie challenges him by correcting Helen's behavior, he feels under-minded. He is, after all, the one used to giving orders. Especially since he, himself, was/is in the army.
In my view the best word would be ethos. Ethos is the set of fundamental values, guiding principles, social practices and beliefs that constitute the character of a particular culture.
This creates friction. Since the two materials are running against each other.