Professor Richard Seaford is a Professor of the Department of Classics and Ancient History at the University of Exeter. Recent books include Money and the Early Greek Mind: Homer, Philosophy, Tragedy (2004) and Cosmology and the Polis: the Social Construction of Space and Time in the Tragedies of Aeschylus (2012). His presidential address to the Classical Association in 2009 was on ‘The Ancient Greeks and Global Warming’.