This episode was first broadcast in 2011: Mic Cavazzini chats with Professor Simon Gaechter from the University of Nottingham about why we humans just can't co-operate with one another- before putting our panelists through Gaechter's Public Goods Game to see just how selfish we all are. Dr Julie-Anne Popple brings you the latest on morphing moths. Presented by Victoria Bond Produced by James Bourne Support Diffusion by making a contribution Support Diffusion by buying through affiliate links