[Will Rosanne get her job back?]
IMHO, we haven’t heard the last from ROSANNE.
Research Arabs and the slave trade. Look for Persian (Iran) influences.
Persia was the keystone of world trade (all commodities) during the post medieval era. Powerful, rich muslims.
Before that, they built the ME trade routes (spice trade) with east-Asian dynasties and Muslim held “western” outposts in north Africa.