The Industrial Revolution began in Britain in the late 18th century and spread to other parts of the world. It transformed manufacturing from small-scale production done by hand to large-scale production using machines powered by steam engines fueled by coal. This required a reliable source of raw materials, capital, labor, and markets. The Industrial Revolution improved transportation but also led to unsafe working conditions, pollution, and wealth inequality between the new industrialists and the workers. Reforms were eventually implemented to address some of the negative social impacts.