People choose to live in a larger community during Neolithic age than in earlier times because they required and needed a huge number of people for gathering and hunting. They had an enduring shelter, so people decided to attach to a different group so the communities getting bigger and bigger. And aside from that, they could grow sufficient foods to support more people one of this practice is farming.
In the election of 1800, Jefferson and Burr tied.
The main issue is that second place got VP, instead of a ticket running together. So, a President would not have the choice of VP.