the most significant themes dealt with by popes during this period--the Bible, religious freedom, church-state relations, social doctrine, human sexuality, ecumenism, and interreligious dialogue. He describes how papal teaching has changed, developed, and even been contradicted by later popes, although they have failed to expressly acknowledge departures from prior teaching. He details how the doctrine of infallibility, far from serving to bolster the credibility of papal teaching, often has served to undermine it. ""Kevin Keating may not be infallible, but his careful, lawyer-like review of the doctrine of infallibility informs, instructs, and challenges. Vatican II introduced the bishops as a competing platform in matters of faith and morals. The jury is still out whether this strengthens the institutional church or divides it. One thing is certain--Keating's book deserves serious study by those seeking to understand the church in the twenty-first century."" --Douglas W. Kmiec, United States Ambassador (ret.) Kevin T. Keating is a Chicago-area attorney. He practiced law for almost three decades in the areas of commercial litigation, creditors' rights, and corporate bankruptcy, handling trials and appeals in both state and federal courts. Prior to his legal career, he had obtained an MA in philosophical theology from Graduate Theological Union and pursued additional graduate study at the University of Chicago Divinity School.