In 1973 Mexican anthropologist Santiago Genovés decided to create an experiment to find out what drives people to commit acts of violence. He put a group of men and women from different parts of the world on a raft and cast them out to sea. What happened was not what he expected though, as we hear from three of the women who took part - Fay Seymour, Edna Reves and Maria Bjornstam. (Photo credit: Modern Films.)