What were the primary functions of Druids in ancient Celtic society?

Druids played a crucial role in ancient Celtic society, primarily through their functions in religious rituals and law. They were revered as religious leaders and spiritual guides, conducting various ceremonies such as sacrifices, festivals, and rites of passage. Additionally, Druids served as the custodians of oral tradition, which included legal knowledge and customs, effectively functioning as judges and lawmakers within their communities.

This dual role meant that they held significant influence over both the spiritual and social order of Celtic tribes, ensuring moral guidance through rituals and reinforcing societal norms through legal frameworks. Their expertise in these areas distinguished them as key figures in maintaining the cultural and ethical fabric of ancient Celtic life. The other options mentioned do not align with the historical understanding of Druid activities, which primarily revolved around religious and legal matters rather than the more secular roles suggested.