Blair Worden is one of Britain's pre-eminent historians of the 17th century and Emeritus Fellow of St Edmund Hall, University of Oxford, UK. His books include Roundhead Reputations: The English Civil Wars and the Passions of Posterity (2001), Literature and Politics in Cromwellian England: John Milton, Andrew Marvell, Marchamont Nedham (2007), The English Civil Wars 1640-1660 (2010) and God's Instruments: Political Conduct in the England of Oliver Cromwell (2012).