I believe it's between Men and Women.
Chivalry filled with a set of standards that society expected a group of people did and determine what considered as appropriate and not appropriate.
This type of thinking started to became popular during the medieval period but started to diminished as the roles between Men and women started to interlace with one another.
The greatest threat was malaria.
Answer:
industrial revolution?
Explanation: it was around 1760 so this should explain the increase in factories in the early 1800s.
The Roman Empire was divided by Theodosius, its emperor until 395, among his two sons, Arcadius, who governed in the east, and Honorus, who governed in the west, and it has never been reunited after that.