The book deals with thinkers and movements that were embraced by many second-century religious seekers but which are now largely forgotten or known only as “heretics”: Basilides, Sethianism, Valentinus’ school, Marcion, Tatian, Bardaisan, Montanists, Cerinthus, Ebionites, Nazarenes, Jewish-Christianity of the Pseudo-Clementines, and Elchasites.

The book deals with thinkers and movements that were embraced by many second-century religious seekers but which are now largely forgotten or known only as "heretics": Basilides, Sethianism, Valentinus' school, Marcion, Tatian, Bardaisan, Montanists, Cerinthus, Ebionites, Nazarenes, Jewish-Christianity of the "Pseudo-Clementines," and Elchasites.

The earliest Christian heretics. "Hultgren and Haggmark have brought together in one volume all of the major orthodox references to persons and theological movements of the first two Christian centuries that were subsequently branded as 'heretical.' In so doing, the editors have done a great service for instructors in early Christian history.. The volume's brief introduction not only helps contextualize the heterodox thinkers or movements in their time but also helps relate the concerns that they addressed in the first and second centuries to those of the late twentieth century. . For those readers as well as for scholars who would like to have a ready reference, this is a useful volume." -Church History "The Earliest Christian Heretics is a 'user-friendly' anthology that will be a great help to both the beginning student and specialized scholar and teacher of early Christianity. Whereas once the researcher had to rifle through the cumbersome volumes of the Ante-Nicene Fathers series, now she can reach for this handy compendium to find all major heresiological entries for the first two centuries presented in a simple, clear format." -Journal of Early Christian Studies "A highly useful compendium of well chosen early Christian writings (in English) directed against a wide variety of heretics, especially Gnostics." -Robert M. Grant, University of Chicago "This book fills a surprising gap. It is highly recommended as a classroom resource for college and seminary, a study guide for the interested nonexpert, and even a handy tool for the graduate student of scholar for quick reference to sources otherwise scattered." -Carolyn Osiek, Catholic Theological Union Arland J. Hultgren is Asher O. and Carrie Nasby Professor of New Testament, and Steven A. Haggmark is Associate Professor of Islamic Studies and Christian Mission and World Religions at Luther Seminary, Saint Paul, Minnesota.

This study explores Marcion's ideas through his writings and the writings of early Christian polemicists who shaped the idea of heresy.

According to the commonly held view, early Christianity was a time of great harmony, and heresy emerged only at a later stage. To the contrary, Gerd Ludemann argues that the time from the first Christian communities to the end of the second century was defined by struggle by various groups for doctrinal authority. Drawing on a wealth of data, he asserts that the losers in this struggle actually represented Christianity in its more authentic, original form. Orthodoxy has been defined by the victors in this struggle and it is they who subsequently silenced alternative views and labeled them heretical. Ludemann's findings are important as well as liberating for the understanding of both Christianity and the Bible. Readers will gain a new understanding of Jesus and the early church from this compelling and controversial book.

Beginning with Walter Bauer in 1934, the denial of clear orthodoxy in early Christianity has shaped and largely defined modern New Testament criticism, recently given new life through the work of spokesmen like Bart Ehrman. Spreading from academia into mainstream media, the suggestion that diversity of doctrine in the early church led to many competing orthodoxies is indicative of today's postmodern relativism. Authors Köstenberger and Kruger engage Ehrman and others in this polemic against a dogged adherence to popular ideals of diversity. Köstenberger and Kruger's accessible and careful scholarship not only counters the "Bauer Thesis" using its own terms, but also engages overlooked evidence from the New Testament. Their conclusions are drawn from analysis of the evidence of unity in the New Testament, the formation and closing of the canon, and the methodology and integrity of the recording and distribution of religious texts within the early church.