The tone of science fictionfilms is often a guide to the tone of the times the film was made: other worlds and species are viewed in turn as wonderful, terrifying, threatening, incomprehensible, and childishly benign.
... under the age of 18 living with them, 41.9% are married couples living together, 16.1% have a female householder with no husband present, and 37.4% are non-families. ...