Britain's vote to leave the European Union on 23 June 2016 will no doubt form the subject of books, doctoral theses and articles for years to come. Like 9/11 which witnessed planes crashing into the World Trade Centre in the US, the dropping of bombs on 6 August 1945 on Japan, and even the storming of the Bastille by the French on 14 July 1789, the day the British made this historical decision is a richly symbolic date.