Who immigrated and why, and how did immigration impact urbanization?

Who immigrated and why:

Many parts of the world decided to leave their homes and immigrate to the United States, They did this because they wanted greater economic opportunity.

How did it impact urbanization?:

It impacted it by leaving a growth in many cities, commonly, factories were located near urban areas. These businesses attracted immigrants and people moving from rural areas who were looking for employment.

racism and segregation.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.