<span>the answer is social class hierarchy
What distinguishes a civilization from a simple group of people is the separation of works/job (specialization of labors) that humans do so every needs of all members in that civilizations is fulfilled.
During this separation, some people will hold more so-called 'important' jobs compared to others (such as kings, business leaders, high-priests, etc) and will naturally formed a social hierarchy among them.</span>
Answer: roman, neo, crusades, rena
Explanation:
During the industrial revolution, more people were needed in factories than in farms. This migration from farms to cities was known as the business revolution.
The period in history between A.D. 395 and A.D. 1500 is known as the Middle Ages.
