To make a plan for government.
In industrial cities there were better chance at getting a job. The ethnic neighborhoods were crowded and dirty. Most immigrants lived in areas where other immigrants from the same country emmigrated from. So you had little Italy, Polish Communities, etc.
Answer: 1346
The Black Death was the deadliest pandemic recorded in human history. The Black Death pandemic resulted in the deaths of up to 75–200 million people in Eurasia and North Africa, peaking in Europe from 1347 to 1351. Plague, the disease, was caused by the bacterium Yersinia pestis.
