a caste system is a division of people into groups based on birth and wealth.
Division of Labor
that would be democracy; under democracy people are allowed to from different groups.
Groups of people or countries that work together are called Alliance
League
division of labour or specialisation
Groups of people who move from place to place are known as nomads
Sandaman
Out-group derogation - apex
disoedient
morays
what is a large group of people and thier goods