Although the Moche had no known enemies,a few of their later settlements did have fortifications.What was the purpose of these defenses?Perhaps food shortages led to bitter infighting among the Moche.Suc acrid conflicts could have led to the death of thousands and hastened the civilization’s decline.The full story of the Moche collapse may never be known.However,I hope articles such as yours will inspire some of your readers to study this and other ancient civilizations.