I dunno, I think that point of view presupposes that everyone on the non-Slavery (for example) side is pretty much in complete harmony and has no need to exchan

I dunno, I think that point of view presupposes that everyone on the non-Slavery (for example) side is pretty much in complete harmony and has no need to exchange views in a way to evolve their shared perspective. I think the article makes this point too: the approach isn't for every circumstance and shouldn't necessarily be used for every person. The pro-slavery people are not really the target audience.