There is mixing of history in the way the term Babylon is used/sung about in Reggae. Basically it’s an all encompussing term used for that which is “western”, and therby all things colonial, opperessive, capitalist (as in taking unfair monitary advantage of the weak), and dominaring.
It’s used in Reggae music, (a prodominanently Rastafarian expression of music, with it’s originating prophet being Halaiee Salasiee, an Ethopian turn of the century ruler who overthrew the Italian colonial rule) as referring to all things wrong and evil.
When tribes in Africa and Arabia were scattered, Babylon (then a large cosmopolitan city, the center of power, currently in modern day Iraq), was representative of all things modern/evil. In later times Babylon was all things Roman and the hedonistic Rome itself was reffered to as Babylon. In colonial times Babylon became some/all places/things/ways Western.