How do words and phrases such as “dispassionately” (paragraph 1), “it was decided” (paragraph 6), “accountable” (paragraph 6), and “generally speaking” (paragraph 9) set a tone that contributes to Krimsky's persuasiveness?

Dispassionately is a very strong word to use for emotion. I was decided is a very final phrase, suggesting no change in narrator's perspective. And generally speaking helps broaden the audience by not setting the tone on one specific theme.

Explanation:

I don't really have context for what you're reading but this is the best I've got.

the answer is slaves

douglas was a slave who turned into a statesman and he refused to celebrate the 4th of july until all slaves were emancipated or set free.

the mending wall was written by robert frost