Why were the nomads constantly moving from place to place thousands of years ago?

Why is the supreme court decision in roe v. wade so controversial.

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.

What river systems the worlds earliest known civilization develop ?