South Carolina's action seemed particularly dangerous because why?

john adams was the 2nd president of the united states.

explanation:

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

the awenser wuold be slaves

it made them more prductive and efficent but with the change of polcies less and les got into the navy