> a long, happy life is guaranteed by forces outside man's control. This will likely alleviate a lot of the tribal issues we face as well.

I suspect it would make it worse. People without a purpose tend to invent tribes and social status to fight for. School kids and prisoners are great examples. Their purpose is basically to passively exist while their physical needs are provided for by the system. Another example is neighborhoods with high unemployment and lots of people living on social welfare.