The anthropologist, James Suzman, explores the shifting meaning of work, and argues that for 95% of our species' history, it held a radically different importance – it did not determine social status, mould our values or dictate how we spent most of our time. How did it become the central organisational principle of our societies and is it time for a dramatic re-think? Also, Ella Harris, Leverhulme Fellow in the Geography department at Birkbeck, University of London, examines ‘pop up culture’. Temporary or nomadic sites such as cinemas, supper clubs and container malls are now ubiquitous in cities across the world. But what are the stakes of the 'pop-up' city? Has economic insecurity and precarity been re-branded as desirable and exciting? Presenter Laurie Taylor Producer Jayne Egerton