​This book challenges the prevailing notion of stability, cohesiveness, and uniformity within Christian communities, inviting readers to view contestation and disagreement as integral to theological reflection and church identity. While the volume focuses predominantly on the Roman Catholic Church as a case study, various chapters broaden the exploration across other Christian and non-Christian traditions. Beginning with the philosophical and theological foundations of conflict, contestation, and community, the book subsequently focuses on four main conflict fields: liturgy, canon law, gender, and sexuality, as well as race and postcolonial critical theory. The book finishes with a constructive proposal on how to think theologically about identity and antagonisms, as well as how to construct an ecclesiology of dissent. Contributors employ diverse methodological perspectives to offer constructive theological reflections, enhancing both understanding and practice of theology in the context of polarised public debates.