Gold and farmland.
It brought mail from the east to the west, and brought communication to the west so that people could get effort on helping the gold being transitioned for people to use as money.
People from the West Indies.
Gold
gold
Gold
it brought diverse groups of people to the west
By people moving west the brought horses so in time they got free and breeded and became wild
Railroads brought supplies and people from the east which made western towns grow
Because people who were moving to the West no longer felt out of touch with those in the East. The telegraph had brought the East and the West together.
Railroads drew people to the west since new towns were built everywhere. There were towns popping up all over the west nd the railroads also brought in new jobs.
#1: it helped to settle the west #2: the east was brought closer to the west
Berber traders introduced written language (arabic) and brought islam to west Africa.