When hearing about human-inflicted tragedies, you have probably wondered at some point or another: How could someone possibly commit such a horrendous act? Evil frequently befuddles us, leading us to picture evildoers as bizzare cases of humanity, completely apart from the typical population.

But how accurate is this depiction of evil? The video below, "What is Evil?" examines Hannah Arendt's thinking as she tries to understand the nature of evil, after witnessing the trial of Nazi Official Adolf Eichmann.