What was the form of government in place in Florence during the
14th-15th century?

Oligarchy

Explanation:

where wealthy Aristocrats rule

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

they became hereditary because there weren't many jobs for people in lower classes