Mass Exodus: Catholic Disaffiliation in Britain and America since Vatican II

This monograph examines the dramatic decline in Catholic affiliation and practice in Britain and America following the Second Vatican Council (1962-1965), offering a comprehensive sociological analysis of what constitutes one of the most significant religious transformations in modern Western history. Bullivant employs extensive quantitative data alongside qualitative research to document and explain the mass departure from Catholicism that has occurred over the past five decades.

The work challenges conventional narratives about secularization by demonstrating that Catholic disaffiliation represents a distinct phenomenon requiring specific explanation beyond general theories of religious decline. Bullivant argues that the post-Vatican II exodus cannot be attributed solely to broader secularization trends, as the timing and scale of Catholic losses exceed those experienced by other Christian denominations during the same period. His analysis reveals that weekly Mass attendance among self-identified Catholics has plummeted from approximately 75 percent in the 1950s to under 25 percent today in both countries studied.

Drawing on surveys, parish records, and demographic analysis, Bullivant identifies multiple interconnected factors driving disaffiliation. These include the liberalizing reforms of Vatican II itself, which inadvertently destabilized traditional Catholic identity; the Church's increasingly contested teachings on sexual ethics, particularly regarding contraception, divorce, and homosexuality; the clerical sexual abuse crisis and institutional cover-ups; and broader cultural shifts toward individualism and religious pluralism. He pays particular attention to generational dynamics, showing how each successive cohort has demonstrated weaker institutional attachment than its predecessor.

The monograph makes several significant contributions to debates about secularization and religious change. Against theorists who view religious decline as inevitable in modern societies, Bullivant demonstrates the contingent, historically specific nature of Catholic disaffiliation. His work also challenges those who minimize the significance of institutional factors in religious vitality, showing how ecclesiastical decisions and scandals directly impact lay participation. Furthermore, he provides crucial empirical grounding for discussions about the future of Christianity in the West, suggesting that current trends toward disaffiliation may be irreversible given the failure to transmit Catholic identity across generations.

While primarily descriptive and analytical in approach, the work carries important implications for understanding the relationship between religious institutions and modern culture, the conditions necessary for religious transmission, and the complex interplay between theological innovation and institutional stability in maintaining religious communities.