Richard Scarry's Best Word Book Ever is a best-selling children's book from the 60s that helps children broaden their vocabulary and practice counting. It was re-edited to be more inclusive in 1991, but people are just now realizing how forward-thinking those edits were. Alan Taylor, a senior photo editor at The Atlantic, was reading the '91 version to his kids when he noticed that it was different from the 1963 version he was given as a toddler.
He cataloged these differences in a Flickr album, and when you look at all of them put together, it becomes clear that Scarry updated the books with diversity and gender equality in mind. For example:
Your move, Peter Rabbit.