Answer:
Spanish missions were explicitly established for the purpose of religious conversion and instruction in the catholic faith.
There are most likely more Pioneers than this, but her are some names that should help you out:
Robert Boyle
Antoine Lavoisier
Margaret Cavendish
Maria Winkelmann
In time a fifth group was added to the cast system-- the untouchables is the correct answer.
The 15th amendment states that the United States government cannot deny a citizen the right to vote based on their color, race, or previous condition of slavery.