Which robber baron became one of the richest people in the world by investing in the shipping and railroad industries?

Cornelius Vanderbilt, known as a prominent robber baron, accumulated immense wealth through his investments in the shipping and railroad industries. He initially made his fortune in the steamboat business before shifting his focus to railroads, where he played a crucial role in consolidating and expanding the network. By the time of his death in 1877, Vanderbilt was one of the richest individuals in the world, significantly shaping the transportation landscape of the United States.