The High Priest, the Pope and I – Ten Questions for Rabbi Cardozo by Rav Ari Ze’ev Schwartz
However blasphemous this may sound, the Kohein Gadol was to be the original pope. Basically, the papacy is a Jewish function, tasked not with the mission of spreading the gospel, but rather promulgating monotheism, morality and the Torah, as far as it is applicable to the non-Jewish world.