What was the post-reconstruction era in america like?

Why did leaders such as siddhartha gautama abandon hinduism to createbuddhism around 500 bce:

What form of government is powers of states?

How did the cleveland massacre impact standard oil in 1872? standard oil hired all the laborers who were nearly killed during the cleveland massacre. standard oil became a monopoly in the cleveland oil market after the cleveland massacre. standard oil was bought out by other companies in the city after the cleveland massacre. standard oil closed down to avoid additional violence in the wake of the cleveland massacre.