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 (1933-2024), Deaths (Obituaries), Stanford Prison Experiment, Psychology and Psychologists, Research, Prisons and Prisoners, Colleges and Universities, Stanford University, Milgram, Stanley, The Stanford Prison Experiment (Movie) NYT > Science