In the Greek text, reference is made to the entire world as opposed to the Roman world. Such a phrase was often used in ancient literature with reference to the inhabited world as known by those writing at the time. In this case it could be a reference to the Roman Empire or to regions within it.1
28 L'un d'eux, nommé Agabus, se leva, et annonça par l'Esprit qu'il y aurait une grande famine sur toute la terre. Elle arriva, en effet, sous Claude.