In the early 2000s, a young man in New Jersey was writing thousands of fake university essays for paying students. Around the same time, financial analysts in New York were rating toxic debt as safe. And in Silicon Valley, a new business philosophy was taking hold: fake it till you make it.

Jamie Bartlett asks how so many people, in so many different worlds, arrived at the same conclusion at the same time. The answer, he thinks, has a name - The Lance Armstrong Defence. A quiet, creeping logic that says everyone else is doing it so why can't I?

Presenter: Jamie Bartlett

A Tempo+Talker production for BBC Radio 4.