The Venn Diagram may be a convenient way to represent the commonalities that exist between groups of numbers, and someone recently likened human social groups to such an item. I don't think that works, though; I don't think our groupings, our microtribes, are Venn-like. I'd call them unevenn diagrams; because while we might all have things in common, we won't have them in common in the same way. We might all, for example, feel anger, but not for the same things, and not all at the same level of intensity.