Agreed.
You can either go down the very dry academic route of trying to extract basic maths and prove 'x' started in central africa 900 years ago and 'y' first appeared in icelandic fishing ditties in 1770. Or, you might just as well argue over which is the nicest colour (it's baby blue, just like my 5c).
The 'list', is simply everything that has gone before. From Wagner, Mozart, Music Hall, Methodism, Woody Guthrie, The BBC Radiophonic Workshop, The New York Dolls and The Bay City Rollers.
Everything except heavy metal, which is the musical equivalent of Down's.