What conditions made slavery and the slave trade possible?

Predict at least one postwar issue that the former allies will disagree about following the war?

The mauryan empire covered most of which modern country

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.