According to a list of world-changing innovations from History.com, mass-produced steel had the largest effect on life in the United States. Steel not only powered the Industrial Revolution but it also became the foundation for railroads, bridges, skyscrapers and cities.
Steel became the largest industry in the world in the 1950s but was utilized most in the United States due to the iron-ore deposits throughout North America. This created a financial boom for the young nation, making steel one of the largest national economies. Henry Bessemer patented the Bessemer process: the first inexpensive mass-production process of steel using molten pig iron.