The correct answer to this open question is the following,
The groups that were not represented in "We the People" were Native American Indians and Hispanics.
I think these groups were excluded from "We the People" because at the time the Constitution of the United States was created, the founding fathers just thought and considered the white people that lived in the 13 colonies.
At that time, Native Indians were not considered United States citizens, and in the case of Hispanics, the Spanish conquerors were colonizing their own territories in New Spain and South America.
The US constitution was created after so much debate by the delegates that attended the Constitutional Convention of 1787, held at the city of Philadelphia, Pennsylvana.
