What is a city-state? (W3.1.1)
This is for K12 middle school

City-state, a political system consisting of an independent city having sovereignty over contiguous territory and serving as a centre and leader of political, economic, and cultural life. A city-state is an independent, self-governing country contained totally within the borders of a single city. The ancient empires of Rome, Carthage, Athens, and Sparta are considered early examples of city-states. ... The only three agreed upon city-states today are Monaco, Singapore, and Vatican City.

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-Dream

A city that is surrounded by territory forms such as an independent state.

Explanation:

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the industrial revolution pushed the world into modern industrialization. it changed the course of history profoundly. it caused rapid urbanization and pushed cities and countries into development. the industrial revolution began in great britain with a series with new inventions which led to the creation of machines and mass production.

this caused the country to gain wealth and money and become an international superpower. it improved transportation and manufacturing inside the country, pushed people to live in urban areas and britain to become the most powerful nation in the world for a while.