Imagination is something the people I'm this time don't have. Their thoughts are controlled. They can't interoperate things. They take the answers that are given and leave it at that.
Millie is Guy Montags wife. She is very empty headed and doesn't feel much. She really only cares about her "family." Her family is many interactive televisions.
People are unhappy in the society. Empty; they cannot feel. Overdose is a normal thing. When people kill themselves overdosing they bring in something that sucks up all the bad running through the bloodstream.
In this future society there is no quarreling among the citizens. They want no inequalities. Inequalities cause arguing shifts the delicate balance of the society.