A common assumption in Christian theology and church history holds that the dietary laws of the Hebrew Bible were rendered obsolete with the rise of the early church. Under this view, often associated with the theology of Paul and the vision of Saint Peter in the tenth chapter of Acts, the arrival of faith in Christ replaced legalistic boundary markers and ritual purifications. Protestant reformers such as John Calvin and Huldrych Zwingli cited Peter’s vision of animals descending on a sheet as proof that all foods had been made permissible, a polemical reading directed against Catholic fasts that persisted in scholarship well into the twentieth century.
Later biblical and anthropological scholarship has complicated this simple narrative of supersession. Historians such as E. P. Sanders and Marcus Bockmuehl observed that Jesus lived and died within Judaism, and that the early Christian movement remained deeply rooted in Jewish tradition. Peter’s vision addressed the inclusion of Gentiles and the legitimacy of table fellowship with them rather than the wholesale abolition of food laws. At the same time, comparative research by anthropologists such as Frederick Simoons demonstrates that food prohibitions, particularly regarding meat, were standard across pre-modern societies. In several early medieval Christian communities, Mosaic dietary legislation was neither forgotten nor allegorized, but observed in concrete daily practice.
Early Christian Ireland provides one of the clearest examples of this phenomenon. Converted from the fifth century onward by figures such as Patrick and Columba, the island lay beyond the former borders of the Roman Empire. Lacking the urban infrastructure, imperial administrative systems, and formal conciliar governance of mainland Europe, Irish Christian life was shaped primarily by monastic leaders. In order to establish moral order in a decentralized society, these charismatic abbots produced legal and penitential texts that governed everyday behavior. Diet occupied a central place within this literature.
The Canons of Adomnán, who served as abbot of the monastery of Iona from 679 until 704, illustrate how strictly early Irish monastic authorities regulated meat consumption. The text paid meticulous attention to how an animal died. Canon 2 stipulated that cattle falling from a cliff could be eaten only if their blood had been shed. If their bones broke but their blood remained within the body, the meat had to be rejected as carrion. Similar prohibitions appeared throughout early Insular texts. The seventh-century penitential associated with Archbishop Theodore of Canterbury imposed a forty-day penance for consuming animals killed by wolves or dogs, and permitted the eating of stags and goats only if they were confirmed to have been slaughtered by human hands. The Preface on Penance by Gildas assigned a forty-day penance for eating carrion even when consumed unwittingly, while an anonymous Irish penitential required a hundred-day bread-and-water fast for eating cat vermin. Beyond the British Isles, Pope Gregory III issued a decree upon his accession in 731 forbidding the consumption of blood and the flesh of strangled animals.
These prohibitions drew partly on the Apostolic Decree of the Council of Jerusalem recorded in Acts 15, which instructed Gentile converts to abstain from blood, strangled meat, and food offered to idols. The Irish canons went far beyond that brief apostolic ruling by developing a complex casuistry to resolve ambiguous situations. While an animal suffocated or torn by predators was forbidden, Adomnán permitted the consumption of sea creatures washed ashore, provided they had not begun to decompose, a concession mirrored in the contemporary Confessional of Pseudo-Egbert.
This distinction between terrestrial and marine animals was rooted directly in the Pentateuch. In the Hebrew Bible, terrestrial animals required the complete draining of their blood prior to consumption because blood was regarded as the physical seat of life. The covenant established with Noah in the ninth chapter of Genesis, alongside the commandments in Leviticus 17, declared that meat containing its lifeblood could not be consumed. To consume an animal whose blood had not been drained blurred the boundary between life and death. For this reason, Adomnán prohibited drowned animals, citing the Law directly as his authority. He also prohibited the consumption of venison in canon 20 on the grounds that the blood of a stag was unusually dense and viscous, meaning that even if an extremity were cut, the lifeblood remained clotted within the flesh, rendering it carrion.
The canons also applied biblical principles to carnivorous animals. In the Genesis narrative of creation, animals were originally assigned plants for food, whereas permission to consume meat was granted exclusively to humanity after the Flood. Predatory and scavenging animals were consequently viewed as having disrupted this divine order by consuming flesh. Adomnán instructed that hens that tasted human blood or flesh were unclean, as were their eggs, though their newly hatched chicks could be preserved. Pigs that tasted human blood were similarly deemed unclean, while their offspring remained acceptable to eat.
When dealing with pigs that scavenged on ordinary carrion, the Irish authorities balanced Levitical purity with agricultural reality. Because pigs naturally fed on refuse and carrion, a permanent ban on any animal that had scavenged would have threatened the local food supply. Adomnán resolved this dilemma by ruling that a pig fattened on carrion was unusable while fat, but became clean once it had grown lean again through lack of food. If an animal had consumed carrion only once or twice, it was deemed fit for consumption after it had fully digested and excreted the matter. Theodore of Canterbury took a comparable approach, requiring pigs or hens that consumed dead bodies to be kept for an entire year until they became weak before their meat could be eaten.
These detailed regulations were drawn directly from Pentateuchal manuscripts circulating in early Ireland. Irish missionaries made use of the Liber ex Lege Moisi, an anthology of thirty-five legal excerpts from the first five books of the Bible, which frequently circulated as part of the Collectio canonum Hibernensis. Seven of these passages, drawn from Exodus, Leviticus, and Deuteronomy, supplied the framework for the dietary canons. They included specific bans on flesh torn by wild beasts, the consumption of fat and blood, meat that touched unclean objects, and animals that died of natural causes.
The Irish texts adapted these biblical passages to their own geographical environment. In Palestine, the pig was excluded from the diet as an unclean scavenger. In forested, temperate Ireland, however, swine were an essential domestic food source. Rather than adopting the blanket ban on pork found in Leviticus 11, the compilers of the Liber ex Lege Moisi omitted the dietary classifications of cloven-hoofed ruminants altogether. Instead, Irish monastic writers focused on the conditions under which pork became contaminated by scavenging and established rules to purify the food supply without eliminating a vital agricultural staple.
Dietary regulations derived from biblical mandates were not confined to Ireland. Correspondence between Boniface and Popes Gregory III and Zacharias in the eighth century shows papal concern over the specific meats consumed by Germanic converts. Charlemagne made the violation of Lenten meat fasts punishable by death and ordered empire-wide fasts in times of famine. In Anglo-Saxon England, legal codes barred the consumption of blood, strangled animals, and the prey of wild beasts. In the East, the Council in Trullo in 695 mandated the deposition of clerics and the excommunication of laypeople who consumed blood, canons that Pope Adrian I confirmed in 785 when instructing Spanish bishops to forbid pork and strangled flesh.
The Irish observance of these rules diverged from continental practice in its cultural context. On the continent, particularly from the ninth century onward, Christian theologians increasingly interpreted Levitical food laws as allegories. This allegorical approach allowed continental Christians to distinguish themselves from Jewish communities living in their midst. In early medieval Ireland, where no Jewish communities existed, literal observance of biblical food rules posed no risk of confusing Christian and Jewish identity. Instead, observing the dietary commandments of the Law served as an effective mechanism for distinguishing the new Christian community from its pagan surroundings.
While the Levitical food rules preserved in early Irish monasticism did not establish a vegetarian society, they demonstrated that early Christians did not view meat consumption as an unproblematic act. Flesh eating remained bounded by extensive ritual and theological safeguards designed to honor the distinction between life and death. The careful boundaries that early medieval Irish monks constructed around slaughter, blood, and animal flesh reflect an enduring historical unease with the consumption of animal life, providing historical grounding for modern theological discussions concerning the place of meat in Christian practice.
Bibliographic Information
- Title: Eating and Believing: Interdisciplinary Perspectives on Vegetarianism and Theology
- Subtitle: Interdisciplinary Perspectives on Vegetarianism and Theology
- Editors: David Grumett and Rachel Muers
- Contributors: Michael Beer, David Brown, Samantha Jane Calvert, David Clough, Erika Cudworth, Daniel Dombrowski, James R. T. E. Gregory, David Grumett, David G. Horrell, Nathan MacDonald, Rachel Muers, Michael S. Northcott, Nigel Pleasants, Teresa M. Shaw, Christopher Southgate, John Wilkins
- Publisher: T&T Clark (A Continuum imprint), London and New York
- Publication Year: 2008
- Edition: First Edition (Hardback)
- ISBN-10: 0-567-03284-1
- ISBN-13: 978-0-567-03284-3
- Historical Period Covered: Ancient Near East / Biblical Antiquity (c. 1000 BCE–1st century CE), Classical and Hellenistic Greece (6th century BCE–2nd century CE), Early Christianity and Late Antiquity (1st–5th centuries CE), Early Medieval Ireland and Carolingian Europe (5th–9th centuries CE), High and Late Middle Ages (12th–15th centuries CE), Enlightenment and Early Modernity (16th–18th centuries), Victorian and Edwardian Eras (19th–early 20th centuries), and Contemporary Postmodernity/21st Century.
- Main Subject Areas: Practical and Systematic Theology, Biblical Studies (Old and New Testament Exegesis), Patristics and Late Ancient History, Classical Greek and Roman Philosophy, Celtic and Medieval Monastic History, Ecofeminist Theory, Philosophical Ethics (Deontology, Utilitarianism, Virtue Ethics, Social Contract Theory), Historical Sociology, and Environmental Ethics.
(Ch. 2, pp. 31–36)