Why were businessmen like carnegie and rocquefelled able to become so wealthy and powerfuln?

Businessmen like Andrew Carnegie and John D. Rockefeller became incredibly wealthy and powerful due to their innovative approaches to industry and their ability to capitalize on emerging markets during the Industrial Revolution. They utilized vertical and horizontal integration to control production and distribution, significantly reducing costs and increasing profits. Additionally, favorable government policies, limited regulation, and a growing consumer market allowed them to expand their businesses rapidly, establishing monopolies in their respective industries. Their success also stemmed from strategic investments and the ability to adapt to changing economic conditions.