The end of Christendom, where the Christian story was known and the church was central, invites Christians in western culture to embrace marginality and discover fresh ways of being church and engaging in mission. While the transition from modernity to postmodernity has received a huge amount of attention, the shift from Christendom to post-Christendom has not yet been fully explored. This book is an introduction; a journey into the past, an interpretation of the present and an invitation to ask what following Jesus might mean in the strange new world of post-Christendom. Drawing on insights from the early Christians, dissident movements and the world church, this book challenges conventional ways of thinking. For those who dare to imagine new ways of following Jesus on the margins, it invites a realistic and hopeful response to challenges and opportunities awaiting us in the 21st century.