In the 1640s England was devastated by a civil war that divided the nation into two tribes – Roundheads and Cavaliers. Counties, towns, even families and friends were rent apart as the nation pledged its allegiance either to King Charles I (supported by the Cavaliers) or to Parliament (backed by the Roundheads). Some 200,000 lives were lost in the desperate conflict which eventually led to the victory of the Roundheads under Oliver Cromwell and the execution of the king in 1649.The ideas that circulated in that febrile climate 350 years ago have shaped our democracy and also created a cultural divide that still resonates today. The Cavaliers represent pleasure, exuberance and individuality. Countering them are the Roundheads who stand for modesty, discipline and equality.To debate both the historical and present-day significance of this divide, Intelligence Squared brought together two acclaimed historians: Charles Spencer to defend the Roundhead cause (in spite of the fact that his forebear the Ist Baron Spencer fought for the Royalists), and Anna Whitelock to make the case for the Cavaliers.Which side are you on – Roundhead or Cavalier