Lewis Wolpert is a distinguished developmental biologist, and is Emeritus Professor of Biology as Applied to Medicine at University College, London. He is the author of, among others, The Unnatural Nature of Science and Malignant Sadness, which was described by Anthony Storr as 'the most objective short account of all the various approaches to depression'. His most recent book about the human cell, How We Live and Why We Die, was published in 2009.