Systems of Stratification
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Stratification systems are classified by how position is assigned and whether it can change: closed systems fix position at birth, open systems permit movement.
Show
A society where occupation is inherited operates differently from one where it is applied for.
Watch for
No real society is purely open or purely closed; the terms mark ends of a range.