This offers a new way of understanding our collective identity in a country wracked by division and brimming with markers of selfhood – faith, race, gender, age, sexuality. Sunder Katwala himself grew up with some questions to work through. As a half-Indian, Irish Catholic child of the NHS, the chequered history of post-imperial Britain seemed very personal to him, but he realised that with that background he could hardly be anything but British, and proud of it too. His timely and clear-eyed analysis seeks to navigate the many crises of this increasingly disunited kingdom: extremism and integration after 7/7; fear of immigration and the deep divides of Brexit; the resurgence of online racism; and the debate over our cultural heritage. He sets out to foster a more open and tolerant society: one that welcomes alternative ideas and cultures rather than shutting them out.