If there is any form of contagion that is adaptive, it is the immediate response to the fear of others. If others are fearful, there may be good reason for you to be fearful too.

The original form is the contagion of fear and alarm. You're in a flock of birds. One bird suddenly takes off. You have no time to wait and see what's going on. You take off, too. Otherwise, you're lunch.

The role of inequity in society is grossly underestimated. Inequity is not good for your health, basically.

If I want to ban any newspaper, I will, with good reason.

Female bonobos form a strong sisterhood. They rule through female solidarity.

Religion may have become a codification of morality, and it may fortify it, but it's not the origin of it.