About Pascal Boyer: Pascal Boyer is a French anthropologist, and Henry Luce Professor of Individual and Collective Memory at Washington University in St. Louis. He is a Guggenheim Fellow.
What we mean when we say that something is "cultural" is that it is roughly similar to what we find in other members of the particular group we are considering, and unlike what we would find in members of a contrast group. This is why it is confusing...
[T]he choice of human groupings for cultural comparisons is not a natural or scientific choice, but a one.