The bright side of any community and even tribe is that if you happen to be the member of the community/tribe that “wins” at stuff (either through war, genocide, economic and cultural colonialism etc) then you’re going to have a more happy life compared to the isolated individual who isn’t part of any community/tribe and who doesn’t get to share the spoils. Of course, if you happen to be part of a “losing” community/tribe then things won’t be so bright for you, but in the end nobody cares about the “losers” (there are exceptions).