If this be so, we must try to indicate roughly what it is, and first of all to which of the arts or sciences it belongs.

It would seem to belong to the supreme art or science, that one which most of all deserves the name of master-art or master-science.

Now Politics 3 seems to answer to this description. For it prescribes which of the sciences a state needs, and which each man shall study, and up to what point; and to it we see subordinated even the highest arts, such as economy, rhetoric, and the art of war.

Since then it makes use of the other practical sciences, and since it further ordains what men are to do and from what to refrain, its end must include the ends of the others, and must be the proper good of man.