Is it just me, or do we all find ourselves, every now and again, feeling like we need to apologize? In my life, this often arises in situations like the following: “Sorry I was late – I really ...

What do mutual grooming, politeness, priestly celibacy, military heroism, car insurance, and overwork have in common? All are probable examples of the recently discovered evolutionary mechanism called ...

Is it just me, or do we all find ourselves, every now and again, feeling like we need to apologize? In my life, this often arises in situations like the following: “Sorry I was late – I really ...

Cooperation in animals has long been a major focus in evolutionary biology. In particular, reciprocal altruism, where helpful acts are contingent upon the likelihood of getting help in return, is ...