We have come to a certain time in which most of what we do are basically based on what we see, hear, and observe from other through the social media, the mass media, and other influential groups. I admit, I am one of those easily influenced by the mentioned media. However, it is really up to us to stand firm on our beliefs and never waver even in times when our principles are put to test.
Because when people traveled along these trade routes they bought the plague with them infecting others along the way.
Teach for America. I took the test this answer is right 100%! ;)
While the region was widely occupied by humans as early as 12,000 B.C.E., historians believe that large civilizations began in Mesopotamia between 4,000 and 3,000 B.C.E. Mesopotamia's development in this period was supported by a series of geographical factors, including rivers and fertile lands.