One Lord, One Faith is a plea and plan to re-envision the Church as a broad, cross-denominational community with a shared faith in the Christ of the Gospel. It both affirms the place and inevitability of individual denominational traditions, and also provides a grid from which to distinguish those denominational traditions from the core of historical orthodoxy shared by the entire Christian community. The book seeks to distinguish denominationalism from sectarianism, and identifies sectarianism as the true enemy of historic catholicity.