I'm not talking about like, at a meeting or something, getting people to suppress their opinions so that they don't get heard. That's obviously manipulation and not just at the personal level.
I mean more along the lines of helping to smooth out when people do all give their opinions - some of them potentially controversial - and prevent people from getting angry because of how one of them presents the issue.
Josh: "And frankly we need someone to stop doing a shitty job of procedure Q or we are not going to finish on time."
Mark: "Well, you know, I'm taking on a lot of responsibility already, so maybe you can fuck off unless you want to do it yourself."
Josh: "Yeah if only someone would - "
Me: "UMM, well, yes. but you both have valid points. Mark, you're already doing a lot and Procedure Q might be too much to ask on top of all that. Maybe we should look at re-delegating it so you have more energy to devote to your other tasks. Josh, you seem to have some good ideas for where we can go with it, do you think you can handle the added responsibility? Mark, are you comfortable with handing over the reins?"
Of course, it doesn't come out as eloquent as that in the heat of the moment, but that's the gist of it.