I would love it if documentation facilitating understanding was available for general technologies. Learning how != learning why. For example, I have many times

I would love it if documentation facilitating understanding was available for general technologies. Learning how != learning why. For example, I have many times tried to learn CSS and it would be _great_ if anyone would care to explain in broad terms what the theory behind it is. Why choose the primitives that they chose, it CSS 'turing complete' for layout? If so, why? Who came up with it? The same goes for many technologies. I would like to have some history, a theoretical backround, and the improvements that the tool tries to solve.