Caste

As for Clan/Tribal, but each clan
has a set role or profession. Those who
don’t follow their clan profession
become clanless (a Social Stigma),
unless there is a system for adoption
into a new clan. Clans usually form a
social hierarchy; e.g., administrators
outrank warriors, who outrank street
sweepers, and so on. Individuals are
expected to associate only with those
of equivalent status. There may also
be rivalries among clans of the same
type (different warrior families, for
instance). CR3 to 6.