Each citizen of your city appears above the buildings panel. Mood is shown by color and posture:
GOLD, arms raised — Happy
GREY, upright — Content
RED, slumped — Unhappy
When unhappy citizens outnumber happy ones, the city falls into civil disorder and stops working.
Under REPUBLIC or DEMOCRACY, every military unit AWAY from its home city causes one unhappy citizen (two under Democracy). Press H to set a unit's home city.
A SPECIALIST replaces a worker. It works no tile but yields a single resource. A small badge sits above the head in a distinct color:
$ coin, dim amber — TAXMAN
converts trade into GOLD.
+ atom, cyan — SCIENTIST
converts trade into RESEARCH.
Note, amber — ENTERTAINER
creates LUXURIES.
Click any citizen icon to cycle through specialist roles.