It was important because it enabled countries to make steel cheaply and this was then used to make better tools and better machinery and it enabled the industry to prosper. This forced them to become imperialistic in order to get more resources to increase the scope of the revolution even more.
As cotton became the backbone of the Southern economy, slavery drove impressive profits. The benefits of cotton produced by enslaved workers extended to industries beyond the South. In the North and Great Britain, cotton mills hummed, while the financial and shipping industries also saw gains.