Actually I think you could make a case that it started the Folk/Sixties era when the Kingston Trio did "Tom Dooley" in 57 and ended when Bob Dylan took the stage with an electric guitar at Newport.

Short of that, I think the proposed list on the albums is as good a place to start as any. I'm glad to see Barry and Barry, and Bud and Travis, but would also like to see Joe and Eddie (There is a Meeting Here Tonight) two specific songs by Joan Baez, both of which say it all (Birmingham Sunday) and (Diamonds and Rust) and the song written by Tom Paxton about 9-11 (I forget the exact title, but the refrain is, "They were going up as we were coming down").

All in all, start with the Kingstons, Weavers, Burl Ives and Woody Gutherie, and end it with the Paxton song