Stuart Piggott

Druids constituted a high-ranking priestly class in ancient Celtic societies, serving multifaceted roles as religious leaders, adjudicators, lorekeepers, and advisors. Despite being literate, they are believed to have refrained from written records due to doctrine, with their practices known primarily through accounts by Greek and Roman contemporaries. Early references date to the 4th century BCE, with detailed descriptions appearing in the works of Julius Caesar and other Roman writers. Following the Roman conquest of Gaul, druidic orders were suppressed and largely disappeared from historical records by the 2nd century CE.

Later medieval texts, including Irish mythology and Christian legends, depict druids in various lights, sometimes as sorcerers opposing Christianity. The 18th and 19th centuries saw a revival of interest, leading to the formation of Neo-Druidic groups. Modern scholarship has largely moved beyond earlier misconceptions, focusing on the available historical and archaeological evidence. The etymology of the word 'druid' is traced to Proto-Celtic, possibly relating to 'oak' or an intensive prefix meaning 'very wise', and the Proto-Indo-European verb for 'to see' or 'to know'.

Druids held significant positions within pagan Celtic societies, recognized by both Greco-Roman and Irish sources as crucial figures. Julius Caesar described them as one of the two most important social groups, responsible for organizing religious ceremonies, sacrifices, divination, and legal proceedings. They enjoyed exemptions from military service and taxes and possessed the power to excommunicate individuals. Classical writers like Diodorus Siculus and Strabo characterized them as philosophers and learned individuals in religious and natural philosophy, capable of intervening to halt battles. Instruction was reportedly secret, taking place in natural settings, and involved extensive oral traditions that could take up to twenty years to master. Despite the Gauls possessing written language for ordinary purposes, druidic knowledge was deliberately kept oral to preserve it and enhance memory, with young men often sent for instruction by their families.

Ancient writers frequently mentioned druids in connection with human sacrifice, suggesting victims were often criminals or, if necessary, innocents. A method described by Caesar involved burning victims alive in a large wicker effigy, while other accounts suggest sacrifice by drowning, hanging, and burning. Diodorus Siculus noted that druids acted as intermediaries between people and deities, playing a vital role in rituals and predicting the future through various means, including observing birds and the convulsions of human victims. While archaeological findings have been interpreted as evidence of human sacrifice, some historians and scholars question the accuracy of Greco-Roman accounts, suggesting potential bias or projection of 'barbarian' traits. Some experts believe accusations of human sacrifice were propaganda and that druids were primarily philosophers.

Druids were referred to as philosophers by ancient sources, with their doctrines including the immortality of the soul and metempsychosis, or reincarnation. This belief was likened to Pythagorean teachings, emphasizing that souls transition to new bodies after death. Caesar noted that this doctrine, by diminishing the fear of death, was considered essential for cultivating the highest form of human courage. Beyond this core tenet, druidic studies also encompassed discussions on astronomy, geography, natural philosophy, and various complex questions, all transmitted through rigorous oral education.

““better than a prophet, more knowledgeable than every druid, a king who was a bishop and a complete sage.””

““claimed to have that knowledge of nature which the Greeks call physiologia, and he used to make predictions, sometimes by means of augury and sometimes by means of conjecture””

““The Pythagorean doctrine prevails among the Gauls' teaching that the souls of men are immortal, and that after a fixed number of years, they will enter into another body””

““With regard to their actual course of studies, the main object of all education is, in their opinion, to imbue their scholars with a firm belief in the indestructibility of the human soul, which, according to their belief, merely passes at death from one tenement to another; for by such doctrine alone, they say, which robs death of all its terrors, can the highest form of human courage be developed. Subsidiary to the teachings of this main principle, they hold various lectures and discussions on the stars and their movement, on the extent and geographical distribution of the earth, on the different branches of natural philosophy, and on many problems connected with reli””