The Sons of Liberty was most likely organized in the summer of 1765 as a means to protest the passing of the Stamp Act of 1765. Their motto was, “No taxation without representation.” The Bostonians Paying the Excise-man, or Tarring and Feathering, 1774. Library of Congress.
The sentence from the autobiography that best demonstrates Douglass's main idea that slavery is dehumanizing would be "<span>He [master] was a cruel man, hardened by a long life of slaveholding," since this shows both the short and long-term changes. </span>
