>They were slave groups, conquered by the Greeks in Asia Minor.
This is incorrect. Each of these were separate civilizations and not names for a "group of slaves". This can easily be verified by a simple search so I don't even understand where such a misattribution comes from.
There is no line because there is no western culture, civilization, values, anything. It's a political term invented for superficial political goals. Just like the idea of 'the west'.
Ancient greek civilization based around the greek language, culture, religion, etc. Yes. What exactly is the language, culture, religion, etc of 'the west'. There is none.
If you think there is a 'west', then try defining 'the east'. It's an artificial designation that changes depending on one's political biases.
The people who enjoyed the modified music would not recognize the pre-music-executive versions.
It's hard to imagine a modern lover of https://www.youtube.com/watch?v=Nbe5RERDh4k not recognising or appreciating https://www.youtube.com/watch?v=KWM82eQKdQk
Pre and Post Paul Simon ( Graceland (1987) ) mbaqanga music didn't change that much
Pre (1983) https://www.youtube.com/watch?v=Qq6qRpEZVTY
Post (1987) https://www.youtube.com/watch?v=HR7UbvhVT8g
(1977) https://www.youtube.com/watch?v=I_2D8Eo15wE&t=32s
EDIT: I like the Lead Belly interpretation https://www.youtube.com/watch?v=Fii6PX0-VXs because it sounds like you start to swing the hammer on the beat, but it has enough inertia to land on the spike off the beat.
Lagniappe: https://www.youtube.com/watch?v=GeGImvYpk2U
Their influence goes much farther back than you believe.
It mixes iberian, Gypsy, Arabic and who knows more genres under a very complex guitar tune (Paco de Lucia would be either the Alan Turing or Knuth of guitar players) with even more complex singings.
The rest of the country had jotas/aurreskus/muñeiras and so on, a kind of dance with hops, jumps and kicks to the sound of flutes/tambourines and drums, very different to flamenco and a far simpler structure, pretty common across Europe.
Nowadays, I'd recommend Medina Azahara, a group which mixes flamenco with progressive and psychodelic rock. But it wasn't the first one to do so; Triana did it before.
And then, there are things that jump out to me as false, that could be true, but because the author cites ZERO sources, it's unclear if he's ignorant after 30?! years of research or has an interesting insight.
It's so unscientific, and it's sloppy useless writing like that that makes some people say that the social sciences aren't sciences.
Edit: Wanted to add that the alphabet is a western linguistic concept that’s common to all western languages.