<div>RZS writes:</div>
<div>>> So how did Rava know that the pasuk applied in his own day, and proved that<br>Caesar was a greater king than Shabur? <<</div>
<div> </div>
<div>I think all of your questions provide the answer to the problem. Since there was no clear contemporary ruler who was undisputedly greater than the other, Rav Papa asked the question. Rava, however, was referring to the overall picture of widespread fame and might throughout history, in which Rome was surely the greater as evidenced by the Passuk in Daniel and R' Yochanan's Memra - that Passuk is the ultimate in defintion of influence, and RY applied it to Rome. Rav Papa should surely have known that the overall greater power is Rome - they are surely the more influential and famous,</div>