Amazing how many "current" jokes were old stand bys forty years ago.
I especially liked his dipping into material from as early as the Greek republics.
Based on personal experience, I see no support for Asimov's hope that the quality of jokes (relative to ethnicity and gender imbalances) have improved since 1971. If anything, our humor is less erudite and more(what he would call) "raunchy", for reasons he anticipates in his discussions of the best milieu for telling and listening to jokes.
A fun read.
eBook Isaac Asimov's Treasury of Humor