USA HISTORY

Detailed explanation-1: -In the early 1870s, Carnegie co-founded his first steel company, near Pittsburgh. Over the next few decades, he created a steel empire, maximizing profits and minimizing inefficiencies through ownership of factories, raw materials and transportation infrastructure involved in steel making.

Detailed explanation-2: -A generous philanthropist, he slashed the wages of the workers who made him rich. One of the captains of industry of 19th century America, Andrew Carnegie helped build the formidable American steel industry, a process that turned a poor young man into the richest man in the world.

Detailed explanation-3: -Because of his position, Carnegie had knowledge of the war machine during the Civil War and saw there was a large need for iron products. After the war he used this new knowledge to switch his business interests from railroads and telegraphs to the ironworks industry, eventually founding the Keystone Bridge Works.

Detailed explanation-4: -1875–1900: Steel empire Carnegie made his fortune in the steel industry, controlling the most extensive integrated iron and steel operations ever owned by an individual in the United States.