Long time ago I read a novel called Brain Wave by Paul Anderson https://en.wikipedia.org/wiki/Brain_Wave https://en.wikipedia.org/wiki/Brain_Wave (it predates F

Long time ago I read a novel called Brain Wave by Paul Anderson https://en.wikipedia.org/wiki/Brain_Wave https://en.wikipedia.org/wiki/Brain_Wave (it predates Flowers for Algernon by about 10 years). It has a similar theme of suddenly acquired intelligence but for the whole planet. I you like Flowers for Algernon you'll like Brain Wave.