"The Milgram experiments asked participants to play the role of a “teacher,” who was responsible for administering electric shocks to a “learner” when the learner failed to answer test questions correctly. The participants were not aware that the learner was working with the experimenters and did not actually receive any shocks. As the learners failed more and more, the teachers were instructed to increase the voltage intensity of the shocks — even when the learners started screaming, pleading to have the shocks stop, and eventually stopped responding altogether. Pressed by the experimenters — serious looking men in lab coats, who said they’d assume responsibility for the consequences — most participants did not stop administering shocks until they reached 300 volts or above — already in the lethal range. The majority of teachers delivered the maximum shock of 450 volts. We all like to think that the line between good and evil is impermeable — that people who do terrible things, such as commit murder, treason, or kidnapping, are on the evil side of this line, and the rest of us could never cross it. But the Stanford Prison Experiment and the Milgram studies revealed the permeability of that line. Some people are on the good side only because situations have never coerced or seduced them to cross over."