Whether there are many angels in one order?

Objections

Objection 1 : It seems that there are not many angels in one order. For it was shown above (Question [50], Article [4]), that all the angels are unequal. But equals belong to one order. Therefore there are not many angels in one order.
Objection 2 : Further, it is superfluous for a thing to be done by many, which can be done sufficiently by one. But that which belongs to one angelic office can be done sufficiently by one angel; so much more sufficiently than the one sun does what belongs to the office of the sun, as the angel is more perfect than a heavenly body. If, therefore, the orders are distinguished by their offices, as stated above (Article [2]), several angels in one order would be superfluous.
Objection 3 : Further, it was said above (OBJ 1) that all the angels are unequal. Therefore, if several angels (for instance, three or four), are of one order, the lowest one of the superior order will be more akin to the highest of the inferior order than with the highest of his own order; and thus he does not seem to be more of one order with the latter than with the former. Therefore there are not many angels of one order.