Editing City (section)

===Industrial age===

The [[Industrial Revolution|growth of the modern industry]] from the late 18th century onward led to massive [[urbanization]] and the rise of new great cities, first in Europe and then in other regions, as new opportunities brought huge numbers of migrants from rural communities into urban areas. England led the way as [[London]] became the capital of a [[British Empire|world empire]] and cities across the country grew in locations strategic for [[manufacturing]].<ref>Kaplan et al. (2004), pp. 53–54. "England was clearly at the center of these changes. London became the first truly global city by placing itself within the new global economy. English colonialism in North America, the Caribbean, South Asia, and later Africa and China helped to further fatten the wallets of many of its merchants. These colonies would later provide many of the raw materials for industrial production. England's hinterland was no longer confined to a portion of the world; it effectively became a global hinterland."</ref> In the United States from 1860 to 1910, the [[History of rail transport|introduction of railroads]] reduced transportation costs, and large manufacturing centers began to emerge, fueling migration from rural to city areas.

Some industrialized cities were confronted with health challenges associated with [[overcrowding]], [[occupational hazard]]s of industry, contaminated water and air, [[History of water supply and sanitation#Modern age|poor sanitation]], and communicable diseases such as [[typhoid]] and [[cholera]]. [[Factories]] and [[slum]]s emerged as regular features of the urban landscape.<ref>Kaplan et al. (2004), pp. 54–55.</ref>