Book excerpt: Brexit has changed everything - from our government, to our economy and principal trading relationship, to the organization of our state. This watershed moment, which surprised most observers and mobilized previously apathetic sections of the electorate, is already transforming British politics in profound and lasting ways. In this incisive book, leading analysts of UK and EU politics Geoffrey Evans and Anand Menon step back from the immediacy and hyperbole of the Referendum to explain what happened on 23 June 2016, and why. Brexit, they argue, was the product of both long-term dissatisfaction with the EU and a gradual breakdown in the relationship between parties and voters that spawned detachment, disinterest and disenchantment. Exploring its subsequent impact on the June 2017 General Election, they reveal the extent to which Brexit has shattered the contemporary equilibrium of British politics. These reverberations will continue to be felt for a very long time and could pose a real danger to the health of British democracy if the government fails to deliver on the promises linked to Brexit.