Why is 500 years better than five months or five years as a planning horizon? Why is history so essential to understanding the multiple pasts which shape our conflicted present? The History Manifesto is a call to arms for historians and everyone interested in the role of history in contemporary society. Professor David Armitage, of Harvard University, and Professor Jo Guldi, of Brown University, discuss the importance of history and the humanities in the 21st century at a free public event at LSE, 8 October, 6.30-8pm, followed by Professor Simon Szreter's reflections. For more details: http://www.lse.ac.uk/publicEvents/events/2014/10/20141008t1830vOT.aspx