Sugar and potatoes, as much as the steam engine, underpinned the Industrial Revolution. The production of sugar on plantations in the West Indies was arguably the earliest prototype of an industrial process, reliant though it was on slave labor. Potatoes, meanwhile, overcame initial suspicion among Europeans to become a staple food that produced more calories than cereal crops could from a given area of land. Together, sugar and potatoes provided cheap sustenance for the workers in the new factories of the industrial age.