"The doctrine of the infallibility of Scripture can be denied, but the concept of infallibility as such cannot be logically denied. Infallibility is an inescapable concept. If men refuse to ascribe infallibility to Scripture, it is because the concept has been transferred to something else. The word infallibility is not normally used in these transfers; the concept is disguised and veiled, but in a variety of ways, infallibility is ascribed to concepts, things, men and institutions." This is one of two Systematic Theology booklets that would later become part of R. J. Rushdoony's larger Systematic Theology set.

The papers collected in this volume fall into three main groups. Those in the first group are concerned with the origin and early development of the idea of natural rights. The author argues here that the idea first grew into existence in the writings of the 12th-century canonists. The articles in the second group discuss miscellaneous aspects of medieval law and political thought. They include an overview of modern work on late medieval canon law. The final group of articles is concerned with the history of papal infallibility, with especial reference to the tradition of Franciscan ecclesiology and the contributions of John Peter Olivi and William of Ockham.

Kevin Keating examines the major writings of the Roman Pontiffs from Pius IX in the last half of the nineteenth century to the most recent writings of Francis. He explores the shift in papal focus from internal church matters and attacks on modern thought to concern for matters affecting all of humanity--not just spiritually, but socially, politically, and economically as well. Looming over all of these teachings is the specter of the doctrine of infallibility. First defined in 1870 to cover only papal infallibility, it would be expanded in the 1960s to include the exercise of infallibility by the worldwide college of bishops. Keating discusses 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.