At the time mount Rushmore was sculpted, The presidents on it were on it becasue they had played the most important roles as presidents in their time in office. Other presidents did good things but the movements these presidents made aren't as known as the four presidents on the mount.
space and it took 14 years just to do the heads and the plan was to do the full body and the remaining rocks at th bottem are rubble mabey there would have bin more presadents but it was never finnished
