To import and export the goods
That's because they were preparing for the biggest war in human history. This was the policy of militarism where building up a military was necessary to ensure that the people could fight against others. The number of soldiers in European armies increased twice in size in only 20 years between the 1890s and 1910s.
Virginia and North Carolina grew the most tobacco (it was the cash crop), while South Carolina and Georgia grew the most indigo (it was also a cash crop.)
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The Ninth Amendment states that there are other rights that may exist from the ones that are specifically mentioned and even though they are not listed, it does not mean they can be violated.