In 1961, the American psychologist Stanley Milgram began a series of controversial experiments on ‘obedience to authority’.

His study aimed to show how ordinary people could be capable of committing evil acts, if ordered to do so.

He wanted to understand the psychology behind genocide, telling the BBC: “How is it possible that ordinary people who were courteous and decent in everyday life, can act callously, inhumanely, without any limitations of conscience?”

During the tests, participants were led to believe that they were assisting an unrelated experiment, in which they had to administer electric shocks to another person.

These fake shocks gradually increased to levels that would have been harmful had they been real volunteers.

Vicky Farncombe looks back at the experiment, using BBC archive.

This programme includes original recordings of the experiments which listeners may find disturbing.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there. For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

Recent episodes explore everything from football in Brazil, the history of the ‘Indian Titanic’ and the invention of air fryers, to Public Enemy’s Fight The Power, subway art and the political crisis in Georgia. We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: visionary architect Antoni Gaudi and the design of the Sagrada Familia; Michael Jordan and his bespoke Nike trainers; Princess Diana at the Taj Mahal; and Görel Hanser, manager of legendary Swedish pop band Abba on the influence they’ve had on the music industry. You can learn all about fascinating and surprising stories, such as the time an Iraqi journalist hurled his shoes at the President of the United States in protest of America’s occupation of Iraq; the creation of the Hollywood commercial that changed advertising forever; and the ascent of the first Aboriginal MP.

(Photo: Stanley Milgram beside the shock generator. Credit: BBC)

How the Milgram 'obedience' experiment shocked the world

Witness History