Annachie wrote:They spread from the temple lands, where presumably the families of the Angels were located.
Annachie, the original settlements of Adams & Eves were distributed throughout Safehold. Remember that Alexandria and Tellesberg were already established even before Langhorne's death, which happened shortly after the 'Day of Creation'.
Had humanity been concentrated in only the Temple Lands at first, and then over time spread from there, it's highly unlikely that they would have settled so much of Safehold within such a short period of time (only 8 or 9 centuries), given the level of technology they had before the Merlin era. Galleys simply cannot transport large numbers of colonists.
However, if they spread out from a number of distributed nodes, then it wouldn't have taken so long for humans to spread throughout the major island realms.
Such a distributed original settlement would also have led to a faster diversification of local cultures, languages and traditions/customs, because although contact between local settlements would have been relatively easy and frequent, the same would not have been true for most of Safehold's history between settlements that were located distantly from each other. Regular contact between such distant locations would have become commonplace only after the development of the galleon, as galleys aren't really all that suited to oceanic travel.