His provocative research made him a popular figure on campus. But his exploration of how good people can turn evil raised ethical questions. His provocative research made him a popular figure on campus. But his exploration of how good people can turn evil raised ethical questions. Zimbardo, Philip G, Deaths (Obituaries), Stanford Prison Experiment, Psychology and Psychologists, Ethics (Personal), Research, Prisons and Prisoners, Colleges and Universities, Stanford University, Milgram, Stanley, The Stanford Prison Experiment (Movie) NYT > Science