The document discusses the development of modern cities through the examples of London and Bombay. It describes how London grew rapidly during the Industrial Revolution due to migration from rural areas. By the late 19th century, over 1 million Londoners lived in poor conditions with inadequate housing and public health issues. Efforts were made to improve the living conditions of the working class through planned housing, public transport expansion, and creating green spaces in the city. The modern city emerged through industrialization, colonial rule, and changing ideas about urban planning and public welfare.