AL Kennedy reflects on our tendency to behave badly when we think no-one's watching or when we follow the wrong crowd.

"When psychologists test how people behave with and without oversight, it becomes depressingly clear that if we think nobody's looking, we don't even remotely always let our consciences be our guides," she writes. "Even very normal, pleasant people can delegate their morality to other people who appear to be in charge, even of bizarre and disturbing scenarios."

Producer: Sheila Cook.