Answer:
what?
Explanation:
make the question make sense next time.
Two Italian writers wrote handbooks of proper behavior for rulers and nobles. These “handbooks” were Machiavelli, “The Prince” and Baldassare Castiglione, “The Book of the Courtier”.
So, the core of the study is the behaviour and personality - and this is usually studied by psychology. Therefore we can guess that we are looking for a branch of psychology.
This branch is social psychology - it focuses how the society (social environment) influences this behaviour.
