It promoted the (relatively) rapid diffusion of immigrants, language, and domesticated crops and animals. Those factors are examined in excellent detail in Jared Diamond's book, "Germ, Guns and Steel" which I highly recommend for anyone studying the development of world cultures. It's a long read, but well worth it.
It mught give some extra events some more background events stuff that happened that they did not know bout
In order for Luke to write his Gospel, he had to go to another sources, since we wasn't himself an apostle (one of the twelve first followers of Jesus Christ)
To tihs day, there is a lot of controversy as of Luke's sources and even his identity. One of the few things we know for sure is he took writings from apostles Mark and Mathew. From the list of responses, we can also pick the name Paul, since Luke is named in the bible "a companion of Paul"
Reducing discrimination against borrowers.