Gastropod has two excellent podcasts on the subject...

(1) "Grounds for Revolution: The Stimulating Story of How Coffee Shaped the World" at https://gastropod.com/grounds-for-revolution-the-stimulating...

(2) "Déjà-Brew: How Coffee Got Bad, Then Worse, and, Finally, Good Again" at https://gastropod.com/deja-brew-how-coffee-got-bad-then-wors...