Key Figure in Industrial Capitalism and Steel Manufacturing

As the United States transitioned from an agrarian economy to an industrial powerhouse after the Civil War, certain leading figures emerged who played pivotal roles in shaping industrial capitalism. One such figure, known for innovative practices in steel production, significantly contributed to both economic growth and the creation of monopolies during this era. His business strategies included vertical integration, which allowed him to control not only the production of steel but also the supply chain that delivered raw materials. Additionally, he advocated for philanthropy, famously stating that "The man who dies rich dies disgraced." With this individual in mind, which of the following men is best associated with the rise of industrial capitalism through his advancements in the steel industry and later philanthropic efforts?