The early mapmakers really had it very hard to create a proper map, as they didn't had any of the modern technology that nowadays we do. They had to rely on their orientation in the space, be able to properly adjust the distances, using only their eyes and brains. Also, they were putting into the maps areas that were told and described by them by people that were there, but they personally haven't even seen the place. The knowledge they had about the size of the world was very limited, as they were not really able to travel that much during their lifetime.
Their interpretation is usually relatively good and relatively accurate considering the circumstances. Of course there were some misjudged distances and proportions, but not by far. Since they only new so much of the world, they usually were making the map, thus the size of the world, from the eastern most location they new, to the westernmost location they new, either putting straight lines like that is the end of the world, or putting waters to mark the same.
The AG industry was able to provide way bigger amounts of food. With higher amounts and productivity gave farmers a easier time to keep up with the growing population around the world. more people means higher demand for food in larger quantities.
Sons of Liberty merchants started to boycot British goods. That has cut the American purchases from England by 50% effecting British merchants dramatically.
Answer:
There were a few conditions that allowed Christianity to grow and eventually thrive in the Roman Empire. Christianity emerged during the Pax Romana (Roman Peace), this was a time of relative peace in the empire and limited expansion. It was also the time when the Roman Empire was at its height. St. Paul, the apostle, was able to travel throughout the Mediterranean to different parts of the empire with relative ease in order to spread the message of Christianity. The fact that he possessed Roman citizenship was very helpful as well.
Another favorable condition was the fact that Koine Greek was well known among educated people in many parts of the Roman world. Paul and other Christians were able to easily communicate with one another throughout the Roman Empire. Rome's postal service was very sophisticated and reliable for its time and long distance correspondence was commonplace.
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