My favourite definition of a tribe is that it's a group where everyone gives what they can and takes as little as they need to. Everyone should be willing to give their last slice of bread and be offended at the idea of 'owing someone' for it.
This just doesn't scale well, but it happens in things like gaming groups, married couples, etc.
"From each according to his ability, to each according to his needs."
Karl Marx.
If anything, conservatives and liberals, due to their devotion for capitalism, are united in fracturing people and communities. That's just the natural end goal of an economic philosophy that views everything via the lens of corporate profit.
In the real world, capitalism is an unstable system. The "winner" gets too close to the state and then tries to shape the rules so they fit the incumbent and discourages everyone else. Boeing and the FAA is a recent high profile example.
Social capital is what gives people this sense of belonging - of being in a "tight knit tribe". I think that conservatives understand this a lot better than progressives, who tend to see everything about society in terms of either material conditions (wealth vs. poverty), or zero-sum power relations where one side 'wins' and the other side 'loses'. It's not clear that these matter all that much. Plenty of people throughout history had very little in the way of material resources, and were required to answer to people, institutional frameworks etc. exerting some sort of power on them - and yet, they still found lots of ways to smile and be happy at their life. We should understand how they managed to do that.