The extreme self-sacrifice characteristic of group-selected species such as ants and bees can often be found among soldiers.

People who devote their lives to studying something often come to believe that the object of their fascination is the key to understanding everything.

Liberals are my friends, my colleagues, my social world.

The rider evolved to serve to the elephant.

If I have a mission in life, it is to convince people that everyone is morally motivated - everyone except for psychopaths.

Many species reciprocate, but only humans gossip, and much of what we gossip about is the vale of other people as partners for reciprocal relationships.

Dividing into teams doesn't necessarily mean denigrating others. Studies of groupishness have generally found that groups increase in-group love far more than they increase out-group hostility.