He was the arbiter of townspeople, of feudal lords and of kings.
He frequently assisted Philip in conducting negotiations with foreign powers, and he was an arbiter in tournaments and on all questions of chivalry, where his wide knowledge of heraldry was highly useful.
At Campo Formio he showed himself the first diplomatist of the age, and the arbiter of the destinies of Europe.
If it was Richelieu and not the pope who was the real arbiter of destinies from 1624 to 1642, Urban VIII.
Lombardy was made the seat of war; and here the king of Sardinia acted as in some sense the arbiter of the situation.