The document discusses several studies and cases that demonstrate how context and environment can influence people's behavior and cause them to act in irrational or evil ways. It describes the Stanford Prison Experiment, which showed how assigning normal people roles as guards and prisoners in a simulated prison caused guards to abuse their power. It also discusses the Abu Ghraib prisoner abuse scandal and how most of the guards claimed they were following orders from superiors. Finally, it mentions Milgram's experiment that showed people's willingness to obey authority figures even if it meant harming others. The key question discussed is whether such cases represent "bad apples in a bad barrel" or the power of context and environment to override people's normal dispositions.