The answer is that it indicated the order of "greater importance".
A hierarchy refers to an arrangement of things (objects,
names, values, classes, and so on.) in which the things are represented to as
being "above", "beneath", or "at an indistinguishable
level from" each other. A hierarchy can connect elements either specifically
or in a roundabout way, and either vertically or diagonally. Authoritative structures exist that are both unconventional
and correlative to hierarchy.
