You would like interpreter’s note pads for consecutive interpreting. We use some weird symbols! α means work (from the German Arbeit), αr means worker, and so on. h means president (see that it is like a chair?). A square is State, and a square with a… thingy… is member State. Lovely.
By that logic, the geologic Eon is the most significant. So Hadean = 1; Archean = 2; Proterozoic = 3; Phanerozoic = 4. Since the Earth is undergoing an extreme extinction event, perhaps a new Eon is in order.