We create little hierarchies everywhere we go.
So many places. I have no room for new ones, yet I have to make room because there are people there I want to work with. Now I have to manage it.
If an alien came to Earth and asked why we don't just create a way for a little hierarchy in one place to appear where ever you want it.
It's not out of reach, it would take two or three developers with enough imaginative users to get the ball rolling.
Write down the features you'd have to support, concisely and simply, and provide conventions for making those hierarchies accessible through a very simple format, in JSON or XML or anything isomorphic, and then we start building.
And start releasing apps that work together. That's what I want to do.
WordLand is supposed to be the first such app. But maybe I need to go even simpler for example code. Thinking about it.

The aliens were confused by the inefficent way we were organizing our ideas.