[Quarrelsome]

I disagree, I think the tribalism is artificial and primarily bound the constraints of our ability to perceive reality due to our corporal form and its limitations. Fundamentally we're very empathetic but its all about being able to put the right information in front of the right people at the right time.

Its a matter of information logistics and applied correctly; people like people. Its when people quarantine information and selectively release it (e.g. only negative information) that tribalism can grow.