Brainlies why did the haitian revolution occur? what was the importance of the louisiana purchase? how did it change the united states?

Which of the islamic empires (ottomans, mughals, safavids) were the most influential and why?

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

How has the caste system canged in indea and pacistane