Who was at the top of the social structure in the Byzantine Empire?

Emperor

Explanation:

The Byzantine Empire had three different levels of society. The upper class, the middle class, and the lower class people each with their own skills, like the emperor is at the top. The people did not get to move in between levels of their society it was set at birth by the emperor.

that is because lower interest rates allowed people to work harder to make money. it multiplied like that and now the uno(not the game) is very strong.

i like trains

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.