American was a prosperous country with incredible economic growth between the end of Reconstruction and the Great Depression. It was during this time that "industrial expansion went into high gear because increasing manufacturing efficiencies enabled American firms to cut prices and yet earn profits for financing still better equipment (Henretta 488)." During this era, the manufacturing of steel, the construction of railroads, factories, and warehouses, and the growing demand for technological advancements, increased greatly. Philanthropists, such as Andrew Carnegie, Andrew Mellon, and John D. Rockefeller, took advantage of the situation they were in by investing large sums of capital into the growing economy. Carnegie constructed an enormous steel mill outside of Pittsburgh that became one of the worlds' largest. Mellon started the Union Trust Fund in Pittsburgh, which developed in its later years to one of the largest financial institutions in the country. Rockefeller, who was involved in the...