In a world where it's a common joke that trailers contain the phrase "in a world"...and there are even lists of trailers that used the phrase seriously, as an artifact of a world where a trailer containing "in a world" wasn't a joke...One man...is curious what trailer originated this phrase. But to find out...he's going to have to ask a question...on Movies and TV SE.
What was the earliest trailer to use the phrase "in a world"? The earliest movie on that list is The Road Warrior, from 1981. Was it the first, or was there an earlier one?