The U.S. Senate passed a resolution in 1975 designating March 13 as National Good Samaritan Day. The date marks the anniversary of the 1964 murder of Kitty Genovese, whose case prompted national debate about bystander responsibility.
From tragedy to science
In 1968, psychologists John Darley and Bibb Latane published experiments directly inspired by the Genovese case. They demonstrated the bystander effect: the more people who witness an emergency, the less likely any individual is to act. Their research showed this was not about moral failure but about the diffusion of responsibility, a measurable psychological phenomenon.



