What the growth in major cities by the turn of the 20th century?

By the turn of the 20th century, major cities experienced significant growth due to industrialization, urbanization, and Immigration. Rapid industrial development attracted workers to urban areas, leading to population booms in cities like New York, Chicago, and London. This urban growth also spurred advancements in infrastructure, such as transportation and sanitation, but often resulted in overcrowded living conditions and social challenges. Overall, these dynamics shaped the modern urban landscape and set the stage for continued growth in the 20th century.