Endowed by the Latsis Foundation, the Lakatos Award is given to an outstanding contribution to the philosophy of science. Winners are presented with a medal and given the chance to deliver a lecture based on the winning work. To celebrate the 2015 and the 2016 award winners—Thomas Pradeu and Brian Epstein, respectively—they each delivered a lecture at the LSE last week. Introduced by Hasok Chang, Pradeu’s lecture is entitled ‘Why Philosophy in Science? Re-Visiting Immunology and Biological Individuality’ and Epstein’s is ‘Rebuilding the Foundations of the Social Sciences’.