Chronic fatigue and sleep deprivation do little for competence, feelings of empathy, or the ability to control one's anxiety or avoid making errors.

But the wider sense of belonging provided by a complex modern state helps us extend our feelings of empathy to a much greater number of people.

Other explanations could include a misguided attempt to 'justify' feelings of empathy, where people feel guilty about their distress because they have not been directly affected.

Humans consequently evolved pro-social emotions, such as feelings of empathy or guilt, in response to these moral behaviors.

They have a strong need for admiration, but lack feelings of empathy.