According to Mark Kurlansky, why did people use salt?

All this trade led to the founding of cities. City governments became necessary, as well as men trained to be put in charge of keeping accounts, of maintaining law and order, of ensuring the safety of citizens.

hope this helped

both are true, the congress does have the power to create banks, even if this power is not specifically described in the constitution, since there is nothing restricting it and there is power given to the congress to make "all laws which shall be necessary and proper". maryland was not allowed to tax a branch of the national bank operating there, and the supreme court decided that no state could. both of these topics were discussed in a decision of the mcculloch v. maryland case in 1819.