In the '90s I was talking with a writer friend of mine about music subcultures of the '80s, how they swept up the young and then disappeared. He said that when he was in college, or grad school, in the '80s the same thing happened with short stories: there was going to be a short story movement that would change everything, & the forward-thinking should get ready for it.
Recently I was reading about some cool music bar that -- I think this was back in the '90s -- had a library that consisted of nothing but short story anthologies.
When I was a kid I really liked a book called, as I remember it, 100 Short Short Science Fiction Stories. I just googled this title and it looks like maybe I remembered it wrong and it was actually titled 100 Great Science Fiction Short Short Stories, published 1978.
Life Is Short is a collection of short written works, fiction and nonfiction, with commentary and quickie "write something similar" assignments by David Shields. I haven't read any other Shieldswork but there seems to be a brevity manifesto in there somewhere. These short pieces vary in time from the late-19th Century "Story of an Hour" to that Orwell killing-an-elephant story to, of course, recent stuff. And they vary in quality, though none are terrible.