I didn't read all the way through it but what I read certainly missed the most important characteristic of a small group and that is whether or not people feel

I didn't read all the way through it but what I read certainly missed the most important characteristic of a small group and that is whether or not people feel safe. Although that mostly refers to psychological safety there is of course physical safety. If people don't feel safe to disagree or agree then the group will never get anywhere as a team