The Milgram experiment was performed by Stanley Milgram, who was a psychologist at Yale University. The focus of the research was the conflict between a person's obedience to authority figures and their conscience. It would show how far a person would go in obeying authority when the instructions involved harming someone else.
He concluded that people were more likely to follow, even if it meant to hurt someone. Zimbardo's experiment is known as the Stanford Prison Experiment. It focused on the struggle between officers and prisoners, as well as their roles. He found that people are more often to become the roles that society says they should be.