In the preamble, what do the phrases "ensure domestic tranquility" and "secure the blessings of liberty to ourselves and our posterity" mean?

Why were the colonists beginning to think about what constituted a good government?

The approval of is the states was needed to ratify the constitution

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.