Cotton was pivotal to Britain's Industrial Revolution. Initially, Britain imported finished cotton goods from India. However, 18th-century innovations like the Spinning Jenny and James Watt’s steam engine mechanized production, giving rise to the factory system. Centres like Manchester became 'Cottonopolis,' producing cloth efficiently and cheaply. To fuel these mills, Britain heavily relied on colonial raw cotton supplies from America and then India. This industrial boom spurred rapid urbanization and established Britain as the leading global industrial power. Concurrently, Britain leveraged its dominance to flood markets like India with machine-made textiles, which devastated India's traditional handloom weaving industry. Thus, cotton exemplifies industrialization's dual legacy: immense economic growth and technological advancement for Britain, coupled with the economic subjugation of its colonies.