In September 2014, with the Scottish independence referendum, the United Kingdom came close to being broken apart after three centuries as one of the most successful political unions in history. Yet despite a conclusive No vote, the SNP took almost every seat in Scotland at the 2015 general election. In this book Tam Dalyell offers a personal reflection on why the UK is on the brink of the most serious constitutional crisis in its history. But this is not just a history of why we have ended up where we are. Dalyell also offers sage advice and suggests ways forward which will inform debate as the UK moves into a new political era.