(Great example with soccer fans!) Homogeneity is just a proxy - but if people can better relate to eachother if they look the same and/or believe in the same t

(Great example with soccer fans!) Homogeneity is just a proxy - but if people can better relate to eachother if they look the same and/or believe in the same things, maybe it's a valuable proxy? But you're right, the ability to relate to eachother is more important in the end - and some countries do better on this, even with less homogeneity. I'd call that the "social contract" - I don't know if there is a better way to understand it.