It reflects economic and social changes by having people of different status interacting. It also shows a woman in the picture who wouldn't be in there if not to show changes in the social situation.
The two main reasons why Douglass opposed John Brown in his plan to raid Harpers ferry is because first he was sure that the plan would fail and thus it would lead to many black deaths. The second reason is that Douglas thought that this plan would hurt the abolition movement due to a backlash.
