This man was once a slave owner in the americas, but came to see the horrors that the native people suffered and turned into an advocate for their freedom

answer: hamilton

explanation:

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.