Augustine belonged to a Mediterranean landscape, where grain, vine and olive were grown and people lived on the products of fishing and pasture. Ancient Algeria was at the time an exporter of the oil that burned in lamps over the whole Roman Empire.
Another product exported was garum, a condiment based on rotten fish manufactured in industrial quantities, especially at Tipasa. In later centuries garum was forgotten, but gruel and couscous survived. Gestures and customs have endured down to our times.