[dwallin]

I would say that the partial counterpoint to that is, for most people their values are also largely tribe based, in that their values are not purely fixed, but rather tend to adapt to loosely track the tribal consensus. Very few are the ones willing to stick to their convictions under pressure.

There are clearly some (many?) shared average axiomatic values that seem to be common between very different cultures/religions (although individuals vary much more significantly), but it's much easier to obsess on the places we differ.

Where I strongly disagree is the idea that groups with different fundamental values can't necessarily find common policy ground. A good example is Basic Income, where you can find agreement between groups on opposite sides that both embrace the idea, but for very different value-driven reasons. In many cases, you can also agree to disagree, and just keep your collective hands out of it (eg. separation of religion and state).