> There have been some theories on this phenomenon, with the most prevalent being the tendency for Wikipedia pages to move up a "classification chain".<p>I've not heard people talk about it, but it seems like there's a model of information in the Dewey classification system, where 000 includes information systems and general reference itself, then 100 is philosophy, all the way up to 900, which is history. It's something like abstract ("information" to concrete ("real, specific things that happened"). By this theory, it makes sense that moving up the classification chain would take you to Philosophy, if you go far enough. But if that's what was happening, I'd expect it to keep going beyond Philosophy into the 000s.<p>Maybe, maybe not. Rather than admit my theory is wrong, I'll just pretend that the substrate on which Philosophy articles are built is Wikipedia, the internet, and other information organizing systems. Thus, all Philosophy articles on Wikipedia have an implied link above them in the classification chain. Phew, crisis averted.