"Sermo Lupi ad Anglos" is a medieval text attributed to the monk Wulfstan of Winchester, written in Old English around the early 11th century. The title translates to "The Sermon of Wolf to the English," and it addresses the moral and spiritual decline of the English people, urging them to repent and return to a righteous path. The sermon reflects the socio-political context of the time, particularly the threats posed by Vikings and the need for unity among the English. It emphasizes themes of sin, divine judgment, and the importance of good governance, serving as both a religious exhortation and a call to action for the community.