What inventions allowed for the birth of the modern city and what problems were created by urbanization?

The very first cities were founded in Mesopotamia after the Neolithic Revolution, around 7500 BCE. ... units, as well as how trade routes allowed certain cities to expand and grow ... Discuss the problems urbanization created for newly formed cities ... The growth of modern industry from the late 18th century onward led to ...

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.

d. william mckinley's southern upbringing him win.