Your 'truth' was taught to me at Springfield High School in the 1960's.  Anyone who can read can figure it out by reading the US Constitution and the 3/5 slave provisions alone.   Where were you educated that these facts were not taught?

How did you learn about them if not in a school?   

While slavery was part of the Electoral College and House of Representatives paradigm; I submit that a larger proportion was the fear of the illiterate non-property owners controlling the Presidency.