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.
... households out of which 33.8% have children under the age of 18 living with them, 55.2% are married couples living together, 9.2% have a female householder with no husband ...