Darley (April 3, 1938 – August 31, 2018) was an American social psychologist who was professor of psychology and public affairs at Princeton University.
He was the son of noted professor of psychology, John G.
offer aid) at the scene of an emergency, a research interest largely stemming from the tragic case of Kitty Genovese, the New Yorker who was murdered in a New York suburb in March 1964 in the presence of 38 witnesses.