Trump Reads Salamanca School?

When defending his decision NOT to strike Iran at the cost of 150 lives, Trump stated that it was "disproportionate" in comparison to the loss of one un-manned drone.

That's straight out of the School of Salamanca's Just War Theory.

...A war is not legitimate or illegitimate simply based on its original motivation: it must comply with a series of additional requirements:

• It is necessary that the response be commensurate with the evil; use of more violence than is strictly necessary would constitute an unjust war....

The more this guy governs, the better he becomes.