Just a bit of a misunderstanding. What I mean is that when people join groups they can become a little closed off, only interacting with those in their group. For example in the Steem community there are some groups where members usually comment/upvote/resteem and interact with people in their group. Just the tribe mentality can have a negative impact.

I'm not insinuating that all groups do this, just pointing out some of the negative aspects of tribal mentality. A good example would be American politics. You have the Democrats and the Republicans, and the members of both parties keep blind allegiances to their own party and this can have a detrimental overall effect to the nation at large.