tl;dr: In Colour is a 6 or 7/10, South London Is Dead, Long Live South London. How did Skrillex happen? It's all very simple, really. You just have to start in Jamaica in the 1950s, as you do with most things. "Must you explain ALL music the way Grandpa Simpson explains buying a new heel for his shoe?" Yes. Yes I must. See, they had been getting this music imported from America called "jump blues". It sounds kinda like this . There's a strong shuffle beat and a horn section, among other things. It wasn't the sadder rawer kind of blues from the country - your Robert Johnsons and so on - this was blues made for dancing and general post-war jollity. However, you can only import so many 45's before the US vendors just plain run out of new songs. So the Jamaicans decided to make some jump blues themselves. They REALLY emphasised that shuffle beat that was already present but subtler in the American stuff and this emphasis would become the basis for mo