I <3 the cascade! | Go Make Things
Chris makes the valid observation that JavaScript programmers who bemoan the “global scope” of CSS are handily forgetting that JavaScript also has global scope by default.
JS is also global by default. We use IIFEs and wrapper functions to add scope.
And for all this talk about CSS being global, you can actually scope styles when you need to. It’s more-or-less the same way you do it in JavaScript.