Whether the devil is the head of all the wicked?

Objections

Objection 1 : It would seem that the devil is not the head of the wicked. For it belongs to the head to diffuse sense and movement into the members, as a gloss says, on Eph. 1:22, "And made Him head," etc. But the devil has no power of spreading the evil of sin, which proceeds from the will of the sinner. Therefore the devil cannot be called the head of the wicked.
Objection 2 : Further, by every sin a man is made evil. But not every sin is from the devil; and this is plain as regards the demons, who did not sin through the persuasion of another; so likewise not every sin of man proceeds from the devil, for it is said (De Eccles. Dogm. lxxxii): "Not all our wicked thoughts are always raised up by the suggestion of the devil; but sometimes they spring from the movement of our will." Therefore the devil is not the head of all the wicked.
Objection 3 : Further, one head is placed on one body. But the whole multitude of the wicked do not seem to have anything in which they are united, for evil is contrary to evil and springs from divers defects, as Dionysius says (Div. Nom. iv). Therefore the devil cannot be called the head of all the wicked.