The part I don't understand is, where did the stranger-danger thing come from? Was it an early reaction to institutional sexual abuse that was just becoming we

The part I don't understand is, where did the stranger-danger thing come from? Was it an early reaction to institutional sexual abuse that was just becoming well-known? Was it a culture-war thing where racism was socially unacceptable, so we had to fear everyone? Was it just that TV became ingrained enough that everybody lived in fiction more than real life?