The political philosopher John Gray discusses the failures of liberalism; as the TLS publishes its 6,000th issue, Ruth Scurr delves into the back issues to explore how the paper has changed, and how it reflects literary culture more broadly; the TLS's poetry editor Alan Jenkins reads two of his favourite poems from the past century: D. J. Enright 's "The Laughing Hyena, by Hokusai" and "In Your Mind" by Carol Ann Duffy