The president could become a stronger bargainer with congress by increasing his popularity with the people. This is because the members of congress represent citizens and if citizens aren't happy then they're going to complain to their congressman and congresswomen. If they don't act on what their constituents want then they'll eventually be voted out of office for someone who will.
Plantation owners needed big quantity's of on hand labor to grow tobacco, rice, and indigo.
In The Communist Manifesto, Karl Marx hypothesized that capitalism would fail if workers revolted and took over the economic system. They would then change this to socialism, and then it would become communism. This was due to excessive tensions between socio-economic classes and with the working class ultimately taking over, as Marx did not believe capitalism would be able to work within the bounds of society.
