The main way in which the organization of the US government reflect the ideas of Enlightenment philosopher Baron de Montesquieu is that it operates solely on the principle of popular sovereignty--meaning that people elect other people to make choices for them. The state serves them, not the other way around.
They believe that they would be ignored if representation was based on population while large states, because they will not have the same advantages that the big states have.
True I think, black people were not considered fully people