Us and them : understanding your tribal mind / David Berreby.

"That's our biggest difference"
"There are few questions more curious than this"
Counting and measuring
Birds of a feather
Mind sight and kind sight
Looking for the codes
How mind makes world
Inventing tradition in Oklahoma, or what I did on my summer vacation
Them, we burn
"Our common humanity makes us weep''
No humans involved
Don't be a stranger
Hazings and conversions
The heads on the poles
Species of Darwinism.