George gershwin's folk opera was far ahead of its time.

The answer is Porgy and Bess. Porgy and Bess is an English language opera by George Gershwin which is an American composer and written by Ira Gershwin. It is the most famous opera in the 20th century yet the most controversial.

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.