[Kaslin]

If I am not mistaken there were originally 6 Supreme Court justices which were Jon Jay, John Rutlege, Robert Harrison, James Wilson, William Cushing and John Blair

It has been set at nine justices since the Civil War.

[rarestia]

Right, but arbitrarily, much like the number of representatives in the House. They just decided “oh, we’ve got enough reps” in the early 20th century, and we’ve been pegged there since. We used to add new representatives every 10 years after the Census.