I went to a book launch this week, for Embodied Leadership by Pete Hamill – a great writer, and, in the interests of full disclosure, a friend. During a talk about how he came to write the book, Pete suggested that whilst most of us like to think that we would have the courage to speak out, the reality is that the vast majority of us are in a group that don’t.

As an example of this pattern of behaviour, which is endemic in many organisations and is at the heart of how the financial crash and various scandals in the UK National Health Service (to cite just two examples), Pete offered this short experiment from the 1960s.

Watch it. Still think you would be the one to speak out?…