I have found a lot of useful information in this TED talk that Ray Dalio gave a few years ago on group and team dynamics when making decisions.
At 13:20 in the video Dalio says that, “Collective Decision Making is so much better than Individual Decision Making if it is done well.”
At 14:49/50 in the video Dalio notes, “There is an idea meritocracy where everybody can speak up.”