described as "europe's answer to ted", the festival for 2015 took place from 21 to 31 may 2015 and included performances and talks from simon blackburn, mike skinner, george galloway, natalie bennett, lawrence krauss, michael howard, lianne la havas, yasmin alibhai-brown and rae morris among others. as part of the festival, the new college of the humanities presented the iai school. aimed at 16- to 18-year-olds, the iai school explored topics such as free will and politics, sex ethics and morality.