This theory exposes a bias against left-handers.
The task of forming numerals is designed to be easier for
right handers. That was not the intent, but it was the result.
Numerals: 1-9 shows how each of the nine digits could have
easily evolved from tally marks to numerals.
Arrows will navigate you from one step to the next.
Buttons will connect you to the corresponding counterpart for
other numerals.