What caused the growth of cities between 1870 and 1900

Between 1880 and 1900, cities in the United States grew at a dramatic rate. Owing most of their population growth to the expansion of industry, U.S. cities grew by about 15 million people in the two decades before 1900. Many of those who helped account for the population growth of cities were immigrants arriving from around the world.

Explanation:

george calvert wanted maryland to be a colony where could live safely. because georgia's founders wanted a colony of small farms rather than large plantations, they originally banned under british law in the 1700s, people who owed money could be