<span>Yes, we could certainly have a health crisis that blows the Black Death out of the water. What is needed is a virus that is airborne, has a fairly long gestation period and has a high fatality rate.</span>
Obviously the poor had no money, so the bosses of say New York would pay clueless immigrants to vote for them in elections to keep them in high city offices and to continue holding power.
The western front would be impressed by the south and join with them. They tried to impress them with their cotton and their battles.
Hope this helps!