However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.
“A negative judgment gives you more satisfaction than praise, provided it smacks of jealousy.”
“Facebook, from what I can tell, is the virtual equivalent of dropping into the homes of several million people, all of whom say at the same time: 'Hey! Let's set up the slide projector!'”