Shortly before the Civil War, Rockefeller and a partner established a shipping company in Cleveland, Ohio. The company made so much money during the war. In 1863, he and his partner invested in another business that refined crude oil from Pennsylvania into kerosene for illuminating lamps.
More grain was produced elsewhere as well as the fact that increasingly more grain was produced around the same demand of grain.
George Kennan introduced the idea of containing communism
Immigrants supported political machines because they provided jobs and services
President Johnson encouraged former Confederate states to reject the Fourteenth Amendment and he also fired several military commanders who support radical Reconstruction.