I just finished reading The Pleasures of a Futuroscope by Lord Dunsany. It’s a postapocalyptic story…I wouldn’t call it “science fiction”, but it’s not the typical Dunsanian high fantasy.
It’s of interest to completists, and it’s interesting to see a Dunsanian approach to postapocalyptic SF, but in reality it’s pretty skippable. If you want to get a similar flavor with better writing, you’d be better off tracking down some of the propaganda he did during WWI.