Which profession saw a dramatic increase
in demand because of the Civil War?

Demand for materials needed to create the railroad stimulated the economy.This profession lost public confidence due to many frauds.  The first half of the nineteenth century saw a dramatic increase in the number of law schools  formal standards explains why there were so many attorneys in the pre-Civil War period. this is the explaination i found in my book and from my knowledge

Explanation:

montesquieu took the view that the roman republic had powers separated so that no one could usurp complete power. in the british constitutional system, montesquieu discerned a separation of powers among the monarch, parliament, and the courts of law.

your answer would be just capitalism.