wonder what percentage of our likelihood to survive depend on ensuring we still are part of the tribe (e.g. signalling)? I think all communication other than the functional coordination of mundane things (can you pick the kids up today? how much for X etc) would fall into that category. Why otherwise bother with any of it at all?

It seems there is perhaps a relation between the amount of tribalism and uncertainty in life people face? It's easier to take risks and care about art and talk about very complex topics in a distanced way with people from opposing views when we're not in the thick of it?