Humans in situations like this, and at a greater personal cost to themselves, are willing to behave in generous ways with complete strangers, ... These chimps were not motivated to provide rewards to others, even those that they knew socially. In order to be pro-social, you have to demonstrate that it is about the other. This just didn't happen.
-Joan Silk
Select a background
More quotes by Joan Silk
Popular Authors
A curated listing of popular authors.