[jordwest]

My hypothesis: we are social creatures and have an innate instinct not to hurt others, but we’ve been trained to various degrees (through upbringing/trauma/school/work) to disassociate from the pain of hurting others.

The people who did continue to administer shocks were attempting to focus on what they thought was the most important part of the task (pressing the lever), but internally the unconscious effort to habitually dissociate from their own discomfort led them to make more mistakes.

Combine this dissociation with a desire for power or status and you get the world we live in today.