Just think: no Romans running Jerusalem when Christ was born; no Roman empire; no "Romance" languages (French, Italian, Spanish). There would have been no Roman Vatican.
A fundamental determination of history.
Hannibal has been criticized for not marching on Rome after his victory at Cannae, but it’s doubtful that he could have captured the city, given the length of the city walls and the size of the forces at his command. As long as the Romans had armies in the field, Hannibal could not win the war.