On the Ruin of Britain

"On the Ruin of Britain" by Gildas is a historical account written in the early medieval period, likely around the 6th century. The text serves as both a lament and an admonition regarding the moral and social decay in post-Roman Britain. Gildas critiques the sins of the Britons, particularly their disobedience to God and the resultant calamities that have befallen the nation, while also recounting the historical events that led to Britain's ruin and calls for moral reform. In this work, Gildas explores the history of Britain from its Roman occupation to the invasive attacks by the Saxons, Scots, and Picts. He illustrates the initial subjugation under Roman rule and the subsequent rebellions, culminating in the invitation of the Saxons as mercenaries, which ultimately leads to their conquest of the land. Through a series of reflections and theological insights, Gildas emphasizes the consequences of sin and disobedience, detailing not only the external conflicts faced by Britons but also the internal moral decay that led to their suffering. The book conveys a sense of urgency for repentance and renewal among the people of Britain in the face of their dire circumstances.